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CAS No. : | 4441-56-9 | MDL No. : | MFCD01311824 |
Formula : | C6H13BO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | XDRVAZAFNWDVOE-UHFFFAOYSA-N |
M.W : | 127.98 | Pubchem ID : | 199578 |
Synonyms : |
|
Num. heavy atoms : | 9 |
Num. arom. heavy atoms : | 0 |
Fraction Csp3 : | 1.0 |
Num. rotatable bonds : | 1 |
Num. H-bond acceptors : | 2.0 |
Num. H-bond donors : | 2.0 |
Molar Refractivity : | 37.98 |
TPSA : | 40.46 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -5.99 cm/s |
Log Po/w (iLOGP) : | 0.0 |
Log Po/w (XLOGP3) : | 1.54 |
Log Po/w (WLOGP) : | 0.79 |
Log Po/w (MLOGP) : | 0.21 |
Log Po/w (SILICOS-IT) : | -0.62 |
Consensus Log Po/w : | 0.39 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -1.54 |
Solubility : | 3.71 mg/ml ; 0.029 mol/l |
Class : | Very soluble |
Log S (Ali) : | -2.0 |
Solubility : | 1.28 mg/ml ; 0.01 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -0.17 |
Solubility : | 86.9 mg/ml ; 0.679 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 2.18 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With magnesium sulfate In diethyl ether at 20℃; for 16 h; Inert atmosphere; Schlenk technique | General procedure: A mixture of boronic acid (1.0 equiv), pinacol (1.0 equiv) and anhydrous MgSO4 (4.0 equiv) in Et2O (0.5 M) was stirred at r.t. for 16 h. The reaction mixture was filtered and the solvent removed in vacuo. The crude material was purified by distillation or flash column chromatography to give the pure boronic ester. |
14.8 g | at 0℃; for 72 h; Inert atmosphere | Magnesium chippings (3.8 g, 156 mmol, 1.0 eq.) were added to a dried flaskunder argon atmosphere and suspended with dry Et2O (20 mL). A small amount(10 mL) of a solution of cyclohexyl bromide (19.2 mL, 156 mmol, 1.0 eq.) in dryEt2O (200 mL) was added to the magnesium and the activation of the Grignardformation was accelerated by addition of an iodine crystal and heating.Afterwards, the rest of the solution of cyclohexyl bromide in (19.2 mL, 156 mmol, 1.0 eq.) in Et2O(200 mL) was added dropwise over 2 h. The reaction mixture was heated to reflux for 1 h and thenstirred for 17 h.[*a] The reaction mixture was transferred via decantation under a constant flow of argoninto a well dried addition funnel and added dropwise to a solution of trimethyl borate (17.7 mL, 159mmol, 1.02 eq) in Et2O (450 mL) at -78 °C for 2 h. The reaction mixture was then quenched bydropwise addition of HCl (10 wt.percent, 200 mL) and extracted with Et2O (2 x 100 mL), dried over MgSO4and the solvent was removed in vacuo to give c-hex-B(OH)2 as a white solid (Crude: 15.96 g, 125mmol, 80percent). The solid residue was used without further purification and dissolved in dry Et2O(150 mL). Pinacol (17.9 g, 151 mmol, 1.2 eq.) was added in portions at 0 °C and then the reactionmixture was stirred for 72 h.[*b] As a desiccant MgSO4 (5 g) was added to the reaction mixture andstirring was continued for 48 h.[*c] Then the residue was filtered over celite and washed with Et2O (2 x25 mL) and the solvent was removed in vacuo to give a colorless oil. The residue was purified bydistillation (b.p. 65-80 °C, at 4.7-5.0 mbar). The product, c-hex-B(pin) (6) was obtained as a colorlessoil (14.8 g, 70.4 mmol, 56percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium phosphate In 1,4-dioxane at 90℃; for 16h; | 11.A Example 11:; Part A:; To a solution of compound 46 (0.013 mmol) in dioxane (2 ml_) is added cyclohexylboronic acid (2 equivalents), potassium phosphate (0.04 mmol) and dichloro[1 ,1 '-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane (20 mol%). The reaction mixture is de-gassed, flushed with argon and heated at 900C for 16 hours. The precipitates are removed by passing through a plug of celite, washed through with ethyl acetate and the filtrate concentrated. Purification by preparative LC affords compound 80. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium carbonate In 1,2-dimethoxyethane; water at 80℃; for 15h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With magnesium sulfate In diethyl ether at 20℃; for 18h; | |
In hexane byproducts: water; water azeotrope was distilled from a hexane soln. of the boronic acid and HO(CH2)3OH, water was collected in a Dean-Stark trap; the ester was distilled under reduced pressure; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | With potassium hydrogen difluoride In diethyl ether; water at 20℃; | XXVI To 1 g 1-cyclohexylboronic acid in 20 ml of diethylether is added 1.86 g potassiumhydrogenefluoride and 0.86 ml water. Then the mixture is stirred over might at ambient temperature. The reaction is evaporated in vacuum and the residue is stirred with diethylether precipitate is filtered and dried under vacuum. Yield: 2.3 g (97% of theory) Mass spectrometry (El): m/z = 130 [M+] |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With palladium trifluoroacetate In acetone at 40℃; for 48h; Sonication; | |
46% | With dipotassium peroxodisulfate; silver nitrate In dichloromethane; water at 23℃; for 4.5h; | |
45% | With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer In dichloromethane; water at 20℃; for 10h; | General Procedure for the Reaction of Benzoquinone with Boronic Acid General procedure: To a solution of benzoquinone (0.5 mmol, 1.0 equiv) and [Cp*RhCl2]2 (0.025 mmol, 5 mol%) in CH2Cl2 (2 mL) was added the boronic acid (0.75 mmol, 1.5 equiv), H2O (1 mL). Then the solution was stirred vigorously at r.t. for 10 h. Upon completion, the reaction was diluted with CH2Cl2 (3 mL) and washed with 5% NaHCO3. The layers were separated, and the aqueous layer was extracted with CH2Cl2 (3 × 4 mL), dried over Na2SO4, and was evaporated to give the residue. The residue was then purified by column chromatography on silica gel (EtOAc-PE, 1:10) to provide the corresponding product. |
31% | With bis[dichloro(pentamethylcyclopentadienyl)iridium(III)] In dichloromethane; water at 20℃; for 12h; | 2. General procedure for thereaction of benzoquinone with phenylboronic acid. General procedure: To a solution of benzoquinone (0.5 mmol, 1.0 equiv.) and [Cp*IrCl2]2 (0.025mmol, 5%) in dichloromethane (2 mL) was added the phenylboronic acid (0.75 mmol, 1.5 equiv.) and water (2 mL) Then the solution was stirred vigorously at room temperature for 12 h. Upon completion, the reaction was diluted with dichloromethane (5 mL) and washed with 5% sodium bicarbonate. The layers were separated, and the aqueous layer was extracted with dichloromethane (10 X 3 mL), dried over sodium sulfate, and was evaporated to give the residue. The residue was then purified by column chromatography on silica gel (ethyl acetate / petroleumether = 1:10) to provide the corresponding product. |
With dipotassium peroxodisulfate; silver nitrate In dichloromethane; water at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium hydrogen difluoride; In methanol; water; at 20℃; for 0.5h; | General procedure: To a solution of boronic acid or pinacol ester (40 mmol) in methanol (100 mL) was added aqueous potassium hydrogen fluoride (50 mL, 4.5 M, 225 mmol). The resulting white slurry was stirred at room temperature for 30 min, concentrated in vacuo and dissolved in hot acetone. The mixture was filtered, the filtrate was concentrated in vacuo and the residue recrystallised from a minimal amount of ether, to afford the corresponding potassium trifluoroborate salt. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With [bis(acetoxy)iodo]benzene; water; triethylamine In acetonitrile at 20℃; for 0.166667h; | General procedure for syntheses of aromatic alcohols General procedure: To a stirred solution of appropriate organoboronic acids (0.5 mmol, 1.0 equiv.) and Et3N(1.0 mmol, 2.0 equiv.) in CH3CN(acetonitrile: 3 mL, H2O: 11µL, 0.6mmol, 1.2 equiv.), DAIB (0.75 mmol, 1.5 equiv.), dissolved in acetonitrile (2mL) was added drop wise at room temperature and the mixture was allowed to stir for 10 minutes at that temperature. After completion of the reaction indicated by TLC, the reaction mixture was washed with distilled water (3×7 mL) and extracted with CH2Cl2(3×10 mL). The combined organic phase was dried over Na2SO4 and after evaporating the solvent, the residue was purified by column chromatography over silica gel using hexane/EtOAc as eluent to provide the pure target product. |
91% | With Fe2O3-SiO2 nanoparticles; air In water at 50℃; for 3h; Green chemistry; | General procedure: In a round bottomed flask 1 mmol phenyl boronic acid, and4mg of Fe2O3SiO2 in 4 ml of the H2O were taken and stirred atroom temperature for appropriate time. Progress of the reactionwas monitored by TLC. After completion of the reaction mixturewas extracted with Ethyl acetate. Further, the organic layer wasseparated and dried with sodium sulfate. The mixture was concentratedin rotary evaporator and product was purified by column chromatography. The product was analyzed by taking 1H and 13CNMR spectroscopy. |
91% | With dihydrogen peroxide at 30℃; for 5h; Green chemistry; | General procedure for the oxidation of boronic acids General procedure: A mixture of boronic acid (1mmol), DMC (1.0mL) was taken in 25mL round bottom flask with magnetic stirring bar. Then the reaction was activated by addition of 30% H2O2 (2.0equiv.) and stirred at room temperature for 5h. The progress of reaction was monitored by TLC. After disappearance of starting material, added H2O (1.0mL) in to the reaction mixture. The reaction mixture was then further diluted with ethyl acetate (30mL) and subsequently washed with distilled water (5.0mL). The resulting organic extract was dried over anhydrous sodium sulphate. The solvent was removed under vacuum to get crude product which was purified (if necessary) by column chromatography using silica gel with pet ether and ethyl acetate as solvent system to obtain the pure product. The structure of the product was confirmed by GC-MS, M.P. and 1H NMR spectroscopic techniques. |
90% | With sodium chlorite In water at 20℃; for 0.5h; | |
90% | With dihydrogen peroxide In ethanol at 20℃; for 0.166667h; | |
88% | With ozone In ethanol; water at 20 - 30℃; for 0.5h; | |
88% | With pyrene-1,6-dione; oxygen; isopropyl alcohol at 20℃; for 40h; Irradiation; Green chemistry; | |
87% | With urea hydrogen peroxide adduct In methanol at 27 - 29℃; for 3h; Green chemistry; chemoselective reaction; | 2.1 Solution phase protocol: General procedure: To a stirred solution of aryl/alkyl boronic acid (1 mmol) in methanol or acetonitrile solvent (1 ml) was added 1 equiv. of Urea-Hydrogen peroxide (UHP) (2.5 equiv for alkyl boronic acids) at room temperature and the progress of the reaction was monitored by TLC. After completion, the reaction mixture was diluted with water and extracted with dichloromethane (DCM). The combined organic layer was dried over anhydrous sodium sulfate (Na2SO4), evaporated and subjected to silica gel column chromatography for further purification. |
86% | With copper(ll) sulfate pentahydrate; ellagic acid In methanol at 60℃; for 8h; Green chemistry; | In situ synthesis of Cu NPs-EA composite: General procedure: In a typical reaction, 10 mol% CuSO4·5H2O, (0.049 g, 0.2 mmol)and 6.7 mol% EA (20 mg) were mixed in methanol followed by2 mmol of phenylboronic acid. This reaction mixture was kept ina preheated oil bath by maintaining the temperature at 60 °C andstirred under atmospheric pressure. After completion of the reac-tion, modified by TLC, the mixture was washed twice with hot ethylacetate to remove the reactant and product. The hot ethyl acetatewas removed from the reaction mixture and the resulting crudeproduct was purified by a column chromatography using silicagel 260 mesh (pet ether:ethyl acetate) ratio (25:75). The recov-ered catalyst was reused for the next run. All the products werecharacterized by1H and13C NMR spectra. |
86% | With LACTIC ACID; dihydrogen peroxide In water at 20℃; for 0.5h; Green chemistry; | |
80% | With N-ethyl-N,N-diisopropylamine In 1,4-dioxane at 20℃; for 29h; Irradiation; Green chemistry; | |
65% | With sodium periodate; iodobenzene In water; acetonitrile at 80℃; for 8h; | General procedure for syntheses of aliphaticalcohols General procedure: Toa stirred solution of appropriate organoboronic acids (2.0 mmol, 1.0 equiv.) and NaIO4 (4.0 mmol, 2.0 equiv.) in CH3CN-H2O(acetonitrile: 6 mL, H2O: 2 mL), iodobenzene (0.2 mmol, 10 mol%) was added and the mixture was heated at 80 0C for 8 h. After thecompletion of reaction, the reaction mixture was cooled and concentrated to a smaller volume and the crude mixture was directly purified by column chromatography over silica gelusing pentane/Et2O as eluent. |
61% | With tetrabutylammonium tetrafluoroborate; oxygen In N,N-dimethyl-formamide for 16h; Electrochemical reaction; | |
60% | With water; 3-chloro-benzenecarboperoxoic acid In ethanol at 20℃; for 6h; | |
42% | With 2,2-dimethoxy-2-phenylacetophenone; N-ethyl-N,N-diisopropylamine In water at 20℃; for 72h; Irradiation; Green chemistry; | General Procedure for the PhotoOrganocatalytic Hydroxylation of ArylboronicAcids General procedure: Substituted boronic acid (0.60 mmol) was placed in a glass vial and dissolved in water(1.0 mL), followed by 2,2-dimethoxy-2-phenylacetophenone (30.0 mg, 0.12 mmol).DIPEA (580 mg, 4.50 mmol) was added consecutively. The reaction mixture was leftopen stirring at room temperature under household bulb irradiation (2 x 80W householdlamps, see photos below) under open air (in the present of O2) for 72 hours. The reactionmixture was quenched by aqueous solution of HCl (1N, 20 ml). The reaction mixturewas extracted with Et2O (20 mL). The organic layer was washed with brine (20 mL)and dried over Na2SO4. After removal of the solvent in vacuum, the crude product waspurified using flash column chromatography (10% EtOAc in Pet. Ether) to afford thedesired product. |
38% | With 1,3-dimethyl-5-ethyl-4a-hydroperoxyalloxazine; oxygen; hydrazine hydrate In methanol; 2,2,2-trifluoroethanol at 20℃; for 2h; | |
35% | With ammonium hydroxide; potassium nitrate In water at 20℃; for 4h; Electrochemical reaction; chemoselective reaction; | |
65 %Spectr. | With oxygen; N-ethyl-N,N-diisopropylamine In acetone at 25℃; for 7h; Irradiation; | |
> 99 %Spectr. | With oxygen; triethylamine In acetonitrile for 4h; Irradiation; | 2.3. Photocatalytic hydroxylation of phenylboronic acid General procedure: The photocatalytic hydroxylation of phenylboronic acid wascarried out as following: Catalyst (10 mg) and phenylboronicacid (0.5 mmol) was poured into the mixture solution with triethylamine (TEA, 1.5 mmol) dissolved in the acetonitrile (3 mL).Then, the mixture was transferred into a 10 mL Pyrex glass bottlefilled with pure oxygen at atmospheric pressure. The suspensionswere irradiated by a blue LED lamp. After the reaction, the mixturewas centrifuged to completely remove the catalyst particles. Thefiltered solution was analyzed by 1H NMR spectrum using 1, 3, 5-Trimethoxybenzene as the internal standard. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With magnesium sulfate; In diethyl ether; at 20℃; for 16h;Inert atmosphere; Schlenk technique; | General procedure: A mixture of boronic acid (1.0 equiv), pinacol (1.0 equiv) and anhydrous MgSO4 (4.0 equiv) in Et2O (0.5 M) was stirred at r.t. for 16 h. The reaction mixture was filtered and the solvent removed in vacuo. The crude material was purified by distillation or flash column chromatography to give the pure boronic ester. |
14.8 g | In diethyl ether; at 0℃; for 72h;Inert atmosphere; | Magnesium chippings (3.8 g, 156 mmol, 1.0 eq.) were added to a dried flaskunder argon atmosphere and suspended with dry Et2O (20 mL). A small amount(10 mL) of a solution of cyclohexyl bromide (19.2 mL, 156 mmol, 1.0 eq.) in dryEt2O (200 mL) was added to the magnesium and the activation of the Grignardformation was accelerated by addition of an iodine crystal and heating.Afterwards, the rest of the solution of cyclohexyl bromide in (19.2 mL, 156 mmol, 1.0 eq.) in Et2O(200 mL) was added dropwise over 2 h. The reaction mixture was heated to reflux for 1 h and thenstirred for 17 h.[*a] The reaction mixture was transferred via decantation under a constant flow of argoninto a well dried addition funnel and added dropwise to a solution of trimethyl borate (17.7 mL, 159mmol, 1.02 eq) in Et2O (450 mL) at -78 C for 2 h. The reaction mixture was then quenched bydropwise addition of HCl (10 wt.%, 200 mL) and extracted with Et2O (2 x 100 mL), dried over MgSO4and the solvent was removed in vacuo to give c-hex-B(OH)2 as a white solid (Crude: 15.96 g, 125mmol, 80%). The solid residue was used without further purification and dissolved in dry Et2O(150 mL). Pinacol (17.9 g, 151 mmol, 1.2 eq.) was added in portions at 0 C and then the reactionmixture was stirred for 72 h.[*b] As a desiccant MgSO4 (5 g) was added to the reaction mixture andstirring was continued for 48 h.[*c] Then the residue was filtered over celite and washed with Et2O (2 x25 mL) and the solvent was removed in vacuo to give a colorless oil. The residue was purified bydistillation (b.p. 65-80 C, at 4.7-5.0 mbar). The product, c-hex-B(pin) (6) was obtained as a colorlessoil (14.8 g, 70.4 mmol, 56%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
54% | With manganese(III) tris(acetylacetonate) In toluene at 80℃; for 23h; Inert atmosphere; | |
With C6H4NCH2CHCCH2; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-κN1,κN1′]bis[3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC]iridium hexafluorophosphate; oxygen; trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 24h; Sealed tube; Irradiation; | ||
With 1,10-Phenanthroline; copper(II) bis(trifluoromethanesulfonate); aniline; anhydrous silver carbonate In tetrahydrofuran at 60℃; for 24h; |
With potassium peroxodisulfate; tris(2,2′-bipyridine)ruthenium(II) dichloride hexahydrate; N-methacryloyl-N-methylbenzamide In water monomer; 1,2-dichloro-ethane at 20℃; for 36h; Inert atmosphere; Schlenk technique; Irradiation; | 6. Control experiments A 25 mL Schlenk tube was equipped with a stirring bar, acryloylbenzamide 1 (0.5 mmol), alkylboronic acid 2 (1.5 mmol, 3 equiv.), K2S2O8(1 mol, 2 equiv.), TEMPO (2 mol, 4 equiv.) andRu(bpy)3Cl2·6H2O (0.01 mmol, 2 mol%). The mixture was degassed by using standard Schlenktechniques with an oil pump. The mixed solvent of DCE (5 mL) and H2O (1 mL) were injectedinto the reaction tube. Then, the reaction mixture was placed at a distance of about 2 cm froma 5 W blue LED and stirred at room temperature. After 36 h, the reaction mixture was dilutedwith DCM (30 mL) and H2O (25 mL). The aqueous layer was extracted with DCM (2×30 mL).The combined organic layers were washed with saturated brine (25 mL) dried over Na2SO4.The organic solution was concentrated under reduced pressure. TLC shows that the product 3awas not formed and 1-(cyclohexyloxy)-2,2,6,6-tetramethylpiperidine was detected by GC-MS |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: toluene / 4 h / Dean-Stark; Inert atmosphere 2: potassium hydroxide / toluene / 4 h / Dean-Stark; Inert atmosphere; Reflux 3: [Ir(dF(CF3)ppy)2(bpy)](PF6) / acetone; methanol / 11 h / 20 °C / Inert atmosphere; UV-irradiation |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | In tetrahydrofuran; cyclohexane; toluene at 20℃; | 2.1 Example 2 1) Add 13.36 g (0.098 mol) of 2,2-dimethylol propionic acid, 12.54 g (0.098 mol) of cyclohexylboronic acid, and 50 mL of tetrahydrofuran to a 250 mL single-mouth bottle to yield a solution. Stir the solution at room temperature for 3 h, add 80 mL of toluene to the solution, heat and reflux the solution for 1 h. Cool the solution to room temperature, add 80 mL of cyclohexane to the solution until a solid substance begins to precipitate. Thereafter, heat the solution again until the solution is refluxed; cool the solution for allowing crystals to precipitate. Separate the crystals from the solution by filtration, and dry the crystals in the vacuum at the temperature between 70 and 75°C to a constant weight. 12.28 g of intermediate II-2 is obtained, and the yield thereof is 75.0%. |
75% | In tetrahydrofuran; toluene at 20 - 80℃; for 4h; | 2.1 EXAMPLE 2 1) Add 13.36 g (0.098 mol) of 2,2-dimethylol propionic acid, 12.54 g (0.098 mol) of cyclohexylboronic acid, and 50 mL of tetrahydrofuran to a 250 mL single-mouth bottle to yield a solution. Stir the solution at room temperature for 3 h, add 80 mL of toluene to the solution, heat and reflux the solution for 1 h. Cool the solution to room temperature, add 80 mL of cyclohexane to the solution until a solid substance begins to precipitate. Thereafter, heat the solution again until the solution is refluxed; cool the solution for allowing crystals to precipitate. Separate the crystals from the solution by filtration, and dry the crystals in the vacuum at the temperature between 70 and 75° C. to a constant weight. 12.28 g of intermediate II-2 is obtained, and the yield thereof is 75.0%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With Pd(2-[2-(benzylthio)phenyliminomethyl]-4-bromophenol-(H))Cl; potassium carbonate In N,N-dimethyl-formamide at 90℃; for 5h; Sealed tube; Inert atmosphere; | Sulfides 4; Typical Procedure General procedure: A sealed tube was charged with sulfenyl chloride 2a (219mg, 1 mmol), phenylboronic acid (3a) (135 mg, 1 mmol),K2CO3 (254 mg, 2 mmol), catalyst 1a (2 mol%, 10 mg) andDMF (2 mL). The mixture was stirred at 90 °C under an N2atm for 5 h. After completion of the reaction, the mixturewas cooled to r.t. and extracted with EtOAc (2 × 10 mL). The combined extracts were dried over anhydrous Na2SO4,filtered and the solvent removed under reduced pressure.The crude residue was purified by flash chromatographyover silica gel to provide product 4a (166 mg, 89%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
36% | With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer In dichloromethane; water at 20℃; for 10h; | General Procedure for the Reaction of Benzoquinone with Boronic Acid General procedure: To a solution of benzoquinone (0.5 mmol, 1.0 equiv) and [Cp*RhCl2]2 (0.025 mmol, 5 mol%) in CH2Cl2 (2 mL) was added the boronic acid (0.75 mmol, 1.5 equiv), H2O (1 mL). Then the solution was stirred vigorously at r.t. for 10 h. Upon completion, the reaction was diluted with CH2Cl2 (3 mL) and washed with 5% NaHCO3. The layers were separated, and the aqueous layer was extracted with CH2Cl2 (3 × 4 mL), dried over Na2SO4, and was evaporated to give the residue. The residue was then purified by column chromatography on silica gel (EtOAc-PE, 1:10) to provide the corresponding product. |
34% | With bis[dichloro(pentamethylcyclopentadienyl)iridium(III)] In dichloromethane; water at 20℃; for 12h; | 2. General procedure for thereaction of benzoquinone with phenylboronic acid. General procedure: To a solution of benzoquinone (0.5 mmol, 1.0 equiv.) and [Cp*IrCl2]2 (0.025mmol, 5%) in dichloromethane (2 mL) was added the phenylboronic acid (0.75 mmol, 1.5 equiv.) and water (2 mL) Then the solution was stirred vigorously at room temperature for 12 h. Upon completion, the reaction was diluted with dichloromethane (5 mL) and washed with 5% sodium bicarbonate. The layers were separated, and the aqueous layer was extracted with dichloromethane (10 X 3 mL), dried over sodium sulfate, and was evaporated to give the residue. The residue was then purified by column chromatography on silica gel (ethyl acetate / petroleumether = 1:10) to provide the corresponding product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With bis-triphenylphosphine-palladium(II) chloride; potassium carbonate; ruphos In water; N,N-dimethyl-formamide at 80℃; for 0.5h; Inert atmosphere; Sealed tube; | Typical procedure for the palladium-catalyzed synthesis of 3-phenyl isochromen-1-one, 3a General procedure: A sealed tube containing PdCl2(PPh3)2 (38.96mg, 0.055mmol, and 5mol%), Ruphos (5mol%) 3-chloroisochromen-1-one 1a (200.45mg, 1.11mmol), arylboronic acid 2a (1.22mmol), and K2CO3 (306.82mg, 2.22mmol) were purged with nitrogen gas three times. Then, DMF (3.00mL) was added with a syringe. The reaction mixture was stirred at 80°C for 30min and was diluted with ethyl acetate (30mL). The mixture was filtered through a Celite bed and washed with ethyl acetate. The filtrate was concentrated under reduced pressure and the residue was purified on a silica gel column using hexane/ethyl acetate as eluent to afford the desired product, 3a.See Supporting document for spectral data of compounds 3a-zb and 4a-c |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With sodium sulfate In diethyl ether at 20℃; for 25h; | (±)-(4R*,5R*)-2-Cyclohexyl-4,5-diphenyl-1,3,2-dioxaborolane (13c) A solution of (±)-syn-1,2-diphenyl-ethan-1,2-diol (23, 2.05 g, 9.57 mmol) in Et2O (10 mL) was treated with cyclohexylboronicacid (1.23 g, 9.61 mmol) followed by anhydrous Na2SO4 (1.36 g, 9.58 mmol). The resultingsuspension was stirred at rt for 25 h then filtered and the filter cake was washed with Et2O (3x10mL). The filtrate and combined washings were concentrated in vacuo and the residue was purifiedby column chromatography (SiO2, eluting with 10% EtOAc in hexanes) to afford the racemicboronate (±)-13c (2.79 g, 9.11 mmol, 95%) as a colorless oil: IR (neat) 3063, 3031, 2925, 2848,1948, 1876, 1804, 1604, 1496, 1388, 1107, 1016, 759, 697 cm-1; 1H NMR (400 MHz, CDCl3) δ7.42-7.32 (6H, m), 7.30-7.27 (4H, m), 5.14 (2H, s), 1.90-1.82 (2H, m), 1.75-1.63 (3H, m), 1.58-1.50(2H, m), 1.45-1.25 (4H, m) ppm; 13C NMR (100 MHz, CDCl3) δ 141.0 (2C, 0), 129.0 (4C, 1), 128.4(2C, 1), 125.8 (4C, 1), 86.5 (2C, 1), 28.3 (2C, 2), 27.4 (2C, 2), 27.0 (2), 22.0 (1, broad) ppm. 1H and13C NMR spectral data are in agreement with those previously reported by Whiting et al.S7 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With dipotassium peroxodisulfate; silver nitrate In water at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
68% | With bis(acetylacetonate)nickel(II); potassium carbonate In chlorobenzene at 120℃; for 24h; Schlenk technique; | General Procedure for the Ni(acac)2 catalyzed 1,2-addition of alkylboronic acids General procedure: Tryptanthrins (0.2 mmol), alkyl boric acids (1 mmol), Ni(acac)2 (0.03 mmol), potassiumcarbonate (0.4 mmol) and 2 mL chlorobenzene were added to a Schlenk tube. Then theresulting mixture was stirred at 120 oC for specific time until the reaction was completed.The reaction mixture was purified through flash column chromatography on a silica gel(Rf= 0.2-0.3, CH2Cl2; Eluent: Petroleum ether: dichloromethane= 1:20 to puredichloromethane) to yield the targeting products |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
40% | With bis(acetylacetonate)nickel(II); potassium carbonate In chlorobenzene at 120℃; for 40h; Schlenk technique; | General Procedure for the Ni(acac)2 catalyzed 1,2-addition of alkylboronic acids General procedure: Tryptanthrins (0.2 mmol), alkyl boric acids (1 mmol), Ni(acac)2 (0.03 mmol), potassiumcarbonate (0.4 mmol) and 2 mL chlorobenzene were added to a Schlenk tube. Then theresulting mixture was stirred at 120 oC for specific time until the reaction was completed.The reaction mixture was purified through flash column chromatography on a silica gel(Rf= 0.2-0.3, CH2Cl2; Eluent: Petroleum ether: dichloromethane= 1:20 to puredichloromethane) to yield the targeting products |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With bis(acetylacetonate)nickel(II); potassium carbonate In chlorobenzene at 120℃; for 40h; Schlenk technique; | General Procedure for the Ni(acac)2 catalyzed 1,2-addition of alkylboronic acids General procedure: Tryptanthrins (0.2 mmol), alkyl boric acids (1 mmol), Ni(acac)2 (0.03 mmol), potassiumcarbonate (0.4 mmol) and 2 mL chlorobenzene were added to a Schlenk tube. Then theresulting mixture was stirred at 120 oC for specific time until the reaction was completed.The reaction mixture was purified through flash column chromatography on a silica gel(Rf= 0.2-0.3, CH2Cl2; Eluent: Petroleum ether: dichloromethane= 1:20 to puredichloromethane) to yield the targeting products |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
40% | With bis(acetylacetonate)nickel(II); potassium carbonate In chlorobenzene at 120℃; for 40h; Schlenk technique; | General Procedure for the Ni(acac)2 catalyzed 1,2-addition of alkylboronic acids General procedure: Tryptanthrins (0.2 mmol), alkyl boric acids (1 mmol), Ni(acac)2 (0.03 mmol), potassiumcarbonate (0.4 mmol) and 2 mL chlorobenzene were added to a Schlenk tube. Then theresulting mixture was stirred at 120 oC for specific time until the reaction was completed.The reaction mixture was purified through flash column chromatography on a silica gel(Rf= 0.2-0.3, CH2Cl2; Eluent: Petroleum ether: dichloromethane= 1:20 to puredichloromethane) to yield the targeting products |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | Stage #1: 4-tert-butylpyridine With trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In 1,2-dichloro-ethane at 110℃; for 12h; Green chemistry; | |
63% | With [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; oxygen; trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 24h; Sealed tube; Irradiation; | |
53% | With tris(2,2'-bipyridyl)ruthenium dichloride; 1-acetoxy-1,2-benziodoxol-3-one at 30℃; for 16h; Inert atmosphere; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With tris(2,2'-bipyridyl)ruthenium dichloride; 1-acetoxy-1,2-benziodoxol-3-one at 30℃; for 2h; Inert atmosphere; Irradiation; regioselective reaction; | |
70% | Stage #1: 1,3-Benzothiazole With trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In 1,2-dichloro-ethane at 110℃; for 12h; Green chemistry; | |
54% | With [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; oxygen; trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 24h; Sealed tube; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87% | Stage #1: quinoline With trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In 1,2-dichloro-ethane at 110℃; for 12h; Green chemistry; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | Stage #1: pyridine-4-methanol With acetic acid; trifluoroacetic acid In acetonitrile at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In acetonitrile at 110℃; for 12h; Green chemistry; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | Stage #1: 1-Methylbenzimidazole With trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In 1,2-dichloro-ethane at 110℃; for 12h; Green chemistry; Further stages; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | Stage #1: 4-Hydroxyquinazoline With trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 0.166667h; Green chemistry; Stage #2: cyclohexylboronic acid With oxygen In 1,2-dichloro-ethane at 110℃; for 12h; Green chemistry; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
61.2% | With tetrakis(triphenylphosphine) palladium(0); potassium carbonate; In ethanol; water; toluene; at 120℃; for 12h;Inert atmosphere; | 1) In a 250 ml three-neck flask, weigh out 0.05 mol of <strong>[68797-61-5]5-bromo-4,6-dichloropyrimidine</strong>, 0.06 mol of cyclohexylboronic acid,100ml of toluene is stirred and dissolved, protected by nitrogen,Add 0.0025mol Pd(PPh3)4, 0.1mol potassium carbonate,A 50 ml mixture of water and ethanol in a 1:1 volume ratioStir and warm up to 120C, reflux for 12 hours, sample the plate,No residual <strong>[68797-61-5]5-bromo-4,6-dichloropyrimidine</strong> is shown, the reaction is complete; naturally cooled to room temperature, filtered, the filtrate layered, and the organic phase was removed by rotary evaporation under reduced pressure Fractions were passed over a neutral silica gel column to give Intermediate 1-1,HPLC purity 99.3%, yield 61.2%; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With 1,8-diazabicyclo[5.4.0]undec-7-ene In toluene at 110℃; for 24h; Molecular sieve; Inert atmosphere; Schlenk technique; | General procedure for the synthesis of amines General procedure: To a mixture of PhN=NNHTs (1 mmol), boronic acid (1.5 mmol) 4 Å MS (0.25 g) and freshly distilled DBU (3 mmol), dry toluene (2 mL) was added in a Schlenk flask under nitrogen atmosphere. The tube was caped tightly and heated at 110 °C for 24 h. After completion of reaction, water was added to the reaction mixture and extracted with EtOAc. The EtOAc layer was separated, washed with brine, dried over Na2SO4, and evaporated. Purification of the crude product by flash chromatography over silica gel (230-400 mesh) with petroleum ether-EtOAc as eluent gave the pure product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | In methanol; water; for 2h;Inert atmosphere; | General procedure: To the solution of alkyl boronic acidor pinacol ester (10 mmol) in methanol (20 mL) was added saturated aqueous KHF2(15 mL, 3.91 g, 50 mmol, 5.0 equiv). The resulting suspension was stirred for 2 h andthen concentrated to dryness. The residue, a white solid, was extracted with hotacetone, and the combined filtered extracts were concentrated to approximately 5 mL.Ether (or CH2Cl2) was added and the resultant precipitate was collected and dried toafford the potassium trifluoroborate as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67% | With oxygen; trifluoroacetic acid In acetic acid; acetonitrile at 110℃; for 6h; chemoselective reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81.33% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate In 1-methyl-pyrrolidin-2-one at 20℃; for 24h; Schlenk technique; Inert atmosphere; Irradiation; | 1 Example 1 In a Schlenk tube, successively add methyl 2-((tert-butoxycarbonyloxy)(phenyl)methyl)acrylate (146.2 mg, 0.5 mmol), cyclohexylboronic acid (96.0 mg, 0.75 mmol), 1,4-diazabicyclo[2.2.2]octane (11.2 mg, 0.1 mmol), Ir[dF(CF3)ppy]2(dtbbpy)PF6 (5.6 mg, 0.005 mmol) and N-methylpyrrolidone (3 mL) ), under a nitrogen atmosphere, stirred at room temperature for 24 h under a white light irradiation of a 45 W energy-saving lamp. After the reaction was completed, the resulting reaction solution was washed with 0.1 mol/L of dilute hydrochloric acid. The organic layer was washed three times with saturated brine and dried over anhydrous sodium sulfate. After drying the solvent, it was separated by silica gel column chromatography, using PE/EA (20/1) as eluent, and the eluent containing the desired product was collected to give the pale yellow target product methyl 2-(cyclohexylmethyl)-3-phenylacrylate, yield 81.33%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With potassium peroxodisulfate; tris(2,2′-bipyridine)ruthenium(II) dichloride hexahydrate In water monomer; 1,2-dichloro-ethane at 20℃; for 36h; Inert atmosphere; Schlenk technique; Irradiation; | Alkylated Isoquinoline-1,3(2H,4H)-diones 3; General Procedure General procedure: A 25-mL Schlenk tube was equipped with a stirring bar, acryloylbenzamide1 (0.5 mmol), alkylboronic acid 2 (1.5 mmol, 3 equiv), K2S2O8(1 mmol, 2 equiv) and Ru(bpy)3Cl2·6H2O (0.01 mmol, 2 mol%). Themixture was degassed by using standard Schlenk techniques with anoil pump and then filled with nitrogen. A mixed solvent of DCE (5 mL) and H2O (1 mL) was injected into the reaction tube. Then, the reactionmixture was placed at a distance of about 2 cm from a 5 W blue LEDand stirred at room temperature. After 36 h, the reaction mixture wasdiluted with DCM (30 mL) and H2O (25 mL). The aqueous layer wasextracted with DCM (2 × 30 mL). The combined organic layers werewashed with saturated brine (25 mL) and dried over Na2SO4. The organicsolution was concentrated under reduced pressure and purificationwas done by column chromatography on silica gel (200-300mesh) with petroleum ether/EtOAc (5:1 or 10:1, as indicated below)as the eluent to give the pure product 3.4-(Cyclohexylmethyl)-2,4-dimethylisoquinoline-1,3(2H,4H)-dione(3a)16Chromatography: petroleum ether/EtOAc (5:1).Yield: 107 mg (75%); yellow oil.1H NMR (500 MHz, CDCl3): = 8.22 (d, J = 7.5 Hz, 1 H), 7.61-7.58 (m, 1H), 7.39 (t, J = 7.6 Hz, 2 H), 3.35 (s, 3 H), 2.29 (dd, J = 14.0, 7.5 Hz, 1 H),1.87 (dd, J = 14.0, 4.7 Hz, 1 H), 1.53 (s, 3 H), 1.47-1.40 (m, 3 H), 1.23-1.20 (m, 1 H), 1.11 (d, J = 12.7 Hz, 1 H), 0.96-0.70 (m, 6 H).13C{1H} NMR (126 MHz, CDCl3): = 176.0, 163.7, 145.7, 130.6, 130.4,129.0, 128.9, 123.5, 49.6, 49.5, 46.7, 34.8, 34.22, 34.16, 33.0, 32.9,31.6, 31.4, 27.3, 27.2, 26.0, 25.9 |
53% | With 3-oxo-1λ3-benzo[d][1,2]iodaoxol-1(3H)-yl acetate; Eosin In water monomer; 1,2-dichloro-ethane at 20℃; for 14h; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: methanol; water / 2 h / 20 °C / Inert atmosphere 2: dichloromethane; water / 24 h / 25 °C / Inert atmosphere; Sealed tube; Irradiation 3: dichloromethane; methanol; hexane |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With 1,3-bis[(diphenylphosphino)propane]dichloronickel(II) at 70 - 80℃; for 4h; Inert atmosphere; Ionic liquid; | General procedure for the Suzuki coupling reaction General procedure: An oven dried RB flask equipped with magnetic stirrer bar was charged with the IL solvent (BMIM)BF4 or (BMIM)PF6 (5-7 mL), and NBSac (1 mmol), and the mixture was stirred at r.t. under nitrogen atmosphere for 15-20 minutes. The reaction mixture was then charged with the boronic acid (2 mmol) and Pd(OAc)2 or NiCl2(dppp) (5 mol%) and basic-IL [PAIM][NTf2] (2 mmol). The reaction mixture was heated gently under stirring at 70-80 °C, while monitoring the progress of the reaction TLC. Upon completion, the reaction mixture was cooled to r.t. and the products were extracted 4 times with hexane/ethyl acetate (80:20). The solvent was removed under vacuum and the crude product was chromatographed with hexane/ethyl acetate (70:30) mixture to afford pure compounds. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With manganese(III) triacetate dihydrate In acetic acid; acetonitrile at 65℃; for 2h; Electrolysis; Inert atmosphere; Green chemistry; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With manganese(III) triacetate dihydrate In acetic acid; acetonitrile at 65℃; for 2h; Electrolysis; Inert atmosphere; Green chemistry; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With manganese(III) triacetate dihydrate In acetic acid; acetonitrile at 65℃; for 2h; Electrolysis; Inert atmosphere; Green chemistry; | |
47% | With oxygen In ethyl acetate at 120℃; for 16h; Sealed tube; Schlenk technique; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
58% | With sodium metabisulfite; lithium phosphate; choline chloride In N,N-dimethyl-formamide at 130℃; for 10h; Inert atmosphere; | 31 Example 31Synthesis of compound 33 Add 1-methyl-4-nitrobenzene (0.2mmol), sodium metabisulfite (0.6mmol, 3.0 equiv), cyclohexylboronic acid (0.3mmol, 1.5equiv) to the reaction tube,Choline chloride (0.2mmol, 1.0equiv), lithium phosphate (0.4mmol, 2.0equiv),Evacuate and change nitrogen three times and add solvent DMF (2.0mL),The reaction system was heated to 130°C for 10 hours. After all the nitro compounds were completely converted, the reaction system was cooled to room temperature, quenched with water, and extracted with ethyl acetate (10 mL*3).Dry with anhydrous sodium sulfate, filter, concentrate,Column chromatography separation yielded the purified target product 33 (58%). |
58% | With sodium metabisulfite; lithium phosphate; choline chloride; water In N,N-dimethyl-formamide at 130℃; for 10h; Schlenk technique; Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
26% | In 1,4-dioxane at 70℃; for 24h; Dean-Stark; | |
26% | In 1,4-dioxane at 70℃; for 24h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
46% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). 1-chloro-4-(3-cyclohexyl-1,1-difluoroprop-1-en-2-yl)benzene(3a). 85% yield, colorless oil; 1H NMR (500 MHz, CDCl3) δ 7.34-7.27 (m, 2H), 7.24-7.21 (m, 2H), 2.26-2.22 (m, 2H), 1.68-1.58 (m, 5H), 1.25-1.17 (m, 1H), 1.14-1.06 (m, 3H), 0.94-0.86 (m, 2H).13C NMR (126 MHz, CDCl3) δ 154.01 (dd, J = 290.7, 286.6 Hz), 132.94, 132.60 (dd, J = 4.7, 3.2 Hz), 129.60 (t, J = 3.3 Hz), 128.63, 90.36 (dd, J = 22.8, 12.4 Hz), 35.71, 35.10, 32.85, 26.38, 26.05. 19F NMR (376 MHz, CDCl3) δ -90.51 (d, J = 42.5 Hz, 1F), -91.06 (d, J = 42.4 Hz, 1F). HRMS (EI) calcd for C15H17ClF2 (M+) 270.0987, found: 270.0991. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
74% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
86% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
68% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
86% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
74% | With (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile In N,N-dimethyl acetamide at 20℃; for 20h; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
52% | With (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile In N,N-dimethyl acetamide at 20℃; for 20h; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With 1,4-diaza-bicyclo[2.2.2]octane; [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; caesium carbonate In dichloromethane at 20℃; Inert atmosphere; Irradiation; | General Procedure for amplification experiment General procedure: Under the protection of nitrogen, [Ir(dFCF3ppy)2(dtbbpy)]PF6 (0.025 mmol, 0.5mol%), 1a (5 mmol), 2a (10 mmol), DABCO (0.2 equiv), Cs2CO3 (2 equiv) and anhydrous DCM (50 ml) were added into a 100 ml three port flask. The reaction mixture was placed at a distance of about 5 cm from 45 w CFL, stirred at room temperature, and the reaction was tracked by TLC. After the reaction, H2O (100 ml) was added and the water layer was extracted with DCM (3 × 50 ml). The organic phase was combined, dried with anhydrous sodium sulfate, filtered, and the solvent was removed by rotary evaporator. The product 3a (1.03 g) was obtained by column chromatography (PE). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
48% | With [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; oxygen; trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 24h; Sealed tube; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-N1,N1′]bis{3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl-κN]phenyl-κC}iridium(III) hexafluorophosphate; oxygen; trifluoroacetic acid In 1,2-dichloro-ethane at 20℃; for 24h; Sealed tube; Irradiation; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
50% | With magnesium sulfate In tetrahydrofuran at 65℃; for 36h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With bis-triphenylphosphine-palladium(II) chloride; potassium carbonate In 1,4-dioxane at 90℃; for 2h; | 131.131-1 Step 131-1: 2-(cyclohex-1-en-1-yl)-N,N-bis(4-methoxybenzyl)-6-(prop-1-en-2-yl)pyridine- 4-amine. Heated at 90 for 2h, using 2-bromo-N,N-bis(4-methoxybenzyl)-6-(prop-1-en-2-yl)pyridin-4-amine (0.595g, 1.31mmol ), cyclohexylboronic acid (0.182g, 1.44mmol), dioxane (22.0mL), water (5.0mL), potassium carbonate (0.543g, 3.93mmol) and Pd(PPh3)2Cl2 (0.092g, 0.13mmol). The crude product was purified by silica flash column chromatography (4:1 hexane:EtOAc) to give the title compound as a colorless oil (0.360 g, 60%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
51% | Stage #1: 1-bromocyclohexane; Triisopropyl borate With n-butyllithium In tetrahydrofuran at -78 - 20℃; for 15h; Inert atmosphere; Stage #2: water In tetrahydrofuran | 3 Example 3 Add 5mmol 1-bromocyclohexane to a 150mL two-necked flask, and add 80mL of tetrahydrofuran solvent (THF) after removing water and oxygen under nitrogen atmosphere. Then add 5.5mmol boric acid ester, stir well and place it at -78 °C, then add 5.1mmol n-butyllithium dropwise, react at -78 °C for 3h, then return to room temperature for 12h. After the completion of the reaction, the reaction solution was poured into water, extracted with dichloromethane 3 times, then dried with anhydrous MgSO4, filtered, and the solvent was removed by rotary evaporation, and the silica gel column was used for separation and purification. Using n-hexane/dichloromethane as the eluent, the solvent was removed by rotary evaporation and drying to obtain cyclohexylboronic acid with a yield of 51%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
84% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; | |
73% | With acetic acid In acetone at 120℃; for 16h; chemoselective reaction; | General procedure for the alkylation of quinoxalin-2(1H)-ones with alkylboronic acids General procedure: To a 15 mL tube was charged with 1 (0.2 mmol), 2 (0.4 mmol), CH3CO2H (25 mol%), and acetone (2 mL). The tube was heated to 120 oC in the heating block for 16 h. The reaction mixture was then quenched with saturated NaHCO3 solution and extracted with EtOAc. The organic layer was dried over anhydrous MgSO4, and the solvent was removed under reduced pressure. The crude product was further purified by silica gel column chromatography (200-300 mesh silica gel, PE/EA/DCM = 4:1:1) to afford product 4. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
82% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
54% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
73% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
65% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
82% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; | |
80% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
58% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
52% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
52% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With air In N,N-dimethyl-formamide at 20℃; for 12h; Irradiation; | 2.1 Typical experimental procedure for the synthesis of 3-alkylquinoxalin-2(1H)-ones (3a-3ab) General procedure: A 10 mL oven-dried reaction vessel equipped with a magnetic stirrer was charged with quinoxalin-2(1H)-one (1, 0.20 mmol), alkylboronic acid (2, 0.40 mmol) and N,N-dimethylformamide (DMF, 2.0 mL). The reaction vessel was exposed to blue LED (440-445 nm, 1.5 W) irradiation at room temperature in air with stirring for 12 h. After completion of the reaction, the mixture was diluted with water and extracted with ethyl acetate, the organic layer was combined, dried over by anhydrous Na 2 SO 4 , and filtered, then concentrated to yield the crude product, which was further purified by flash chromatography (silica gel, petroleum ether/ethyl acetate = 10:1) to give the desired product 3a-3ad. |
42% | With tert-butylammonium hexafluorophosphate(V); trifluoroacetic acid In N,N-dimethyl-formamide at 80℃; for 8h; Electrolysis; |
Tags: 4441-56-9 synthesis path| 4441-56-9 SDS| 4441-56-9 COA| 4441-56-9 purity| 4441-56-9 application| 4441-56-9 NMR| 4441-56-9 COA| 4441-56-9 structure
[ 87100-15-0 ]
2-Cyclohexyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Similarity: 0.54
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H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
Sorry,this product has been discontinued.
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