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Structure of 156001-49-9
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 156001-49-9 |
Formula : | C8H8Br2 |
M.W : | 263.96 |
SMILES Code : | CC1=CC(Br)=CC=C1CBr |
MDL No. : | MFCD12025011 |
InChI Key : | RRBOULIORCZELO-UHFFFAOYSA-N |
Pubchem ID : | 22569018 |
GHS Pictogram: |
![]() ![]() |
Signal Word: | Danger |
Hazard Statements: | H302+H312+H332-H314 |
Precautionary Statements: | P501-P260-P270-P271-P264-P280-P362+P364-P303+P361+P353-P301+P330+P331-P301+P312+P330-P304+P340+P310-P305+P351+P338+P310-P405 |
Class: | 8 |
UN#: | 3261 |
Packing Group: | Ⅱ |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.25 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 0.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 51.94 |
TPSA ? Topological Polar Surface Area: Calculated from |
0.0 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.62 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
3.54 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
3.5 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
4.12 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.97 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
3.55 |
Log S (ESOL):? ESOL: Topological method implemented from |
-4.08 |
Solubility | 0.0217 mg/ml ; 0.0000823 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.22 |
Solubility | 0.157 mg/ml ; 0.000596 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-4.89 |
Solubility | 0.00336 mg/ml ; 0.0000127 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
Low |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
Yes |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
Yes |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.4 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.89 |
* 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 |
---|---|---|
With NaH; In N,N-dimethyl-formamide; | 1-(4-Bromo-2-methyl-benzyl)-1H-imidazole (Intermediate 139) A solution of imidazole (58.0 mg, 0.86 mmol) in 3 mL DMF was treated with NaH (20.0 mg, 0.86 mmol) and heated to 90 C. After 1 h a solution of 4-bromo-1-bromomethyl-2-methyl-benzene (Intermediate 138, 190.0 mg, 0.72 mmol) in 3 mL DMF was added and stirring at 90 C. continued for 1 hour. The solution was cooled to room temperature and concentrated under reduced pressure. The title compound, 160.0 mg (88%) was isolated by column chromatography (5% MeOH-EtOAc) as a colorless solid. 1H NMR (CDCl3) delta: 7.46 (1H, s), 7.34 (1H, dd, J=1.8 Hz), 7.30 (1H, dd, J=1.8, 8.2 Hz), 7.08 (1H, t, J=1.2 Hz), 6.83 (1H, t, J=1.2 Hz), 6.80 (1H, d, J=8.2 Hz), 5.03 (2H, s), 2.23 (3H, s). | |
With NaH; In N,N-dimethyl-formamide; | 1-(4-Bromo-2-methyl-benzyl)-1H-imidazole (Intermediate 139) A solution of imidazole (58.0 mg, 0.86 mmol) in 3 mL DMF was treated with NaH (20.0 mg, 0.86 mmol) and heated to 90 C. After Ih a solution of 4-bromo-1-bromomethyl-2-methyl-benzene (Intermediate 138, 190.0 mg, 0.72 mmol) in 3 mL DM1F was added and stirring at 90 C. continued for Ihour. The solution was cooled to room temperature and concentrated under reduced pressure. The title compound, 160.0 mg (88%) was isolated by column chromatography (5% MeOH-EtOAc) as a colorless solid. 1H NMR (CDCl3) delta: 7.46 (1H, s), 7.34 (1H, dd, J=1.8 Hz), 7.30 (1H, dd, J=1.8, 8.2 Hz), 7.08 (1H, t, J=1.2 Hz), 6.83 (1H, t, J=1.2 Hz), 6.80 (1H, d, J =8.2 Hz), 5.03 (2H, s), 2.23 (3H, s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride; In N,N-dimethyl-formamide; mineral oil; | Example 32 1,21-Bis[4-(alpha-hydroperoxyisopropyl)-2-methylphenyl]-2,5,8,11,14,17,20-heptaoxaheneicosane To a solution of 354 mg (3.85 mmol) of sodium hydride contained at 60% in mineral oil in dry dimethylformamide (20 ml) was added 1.00 g (3.54 mmol) of hexaethylene glycol, and the mixture was reacted at 40 - 50C for 30 min. Then, 2.06 g (7.79 mmol) of <strong>[156001-49-9]4-bromo-2-methylbenzyl bromide</strong> was added, and the mixture was allowed to react at room temperature for 17 hours. To the reaction solution at 0C was added saturated aqueous solution of ammonium chloride followed by extraction with ethyl acetate. The organic layer was washed with water and concentrated under reduced pressure. The residue thus obtained was subjected to silica gel column chromatography for separation and purification. Elution with ethyl acetate-hexane (1:4) yielded 2.02 g (3.12 mmol) of 1,21-bis(4-bromo-2-methylphenyl)-2,5,8,11,14,17,20-heptaoxaheneicosane. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 0 - 5℃; | Step b intermediate 51 <n="63"/>1 -Bromo-4-(bromomethyl)-3 -methylbenzene(4-Bromo-2-methylphenyl) methanol (10.4 g, 51.6 mmol) is dissolved in anhydrous CH2Cl2 (150 mL) and CBr4 (18.8 g, 56.8 mmol) added. The reaction mixture is cooled to 0-50C and PPh3 (14.9 g, 56.8 mmol) is added. The reaction mixture is stirred overnight then hexane / EtOAc (9:1) (250 mL) is added with vigorous stirring. The triphenylphosphine oxide that forms during the reaction is filtered off and the filtrates are concentrated in vacuo. The resulting oil is purified on a silica gel pad with hexane / EtOAc (8:2). The solvent are removed on a rotary evaporator and the bromoform is removed by vacuum distillation (15 mm Hg, bp: 40-500C) to provide the expected product l-Bromo-4-(bromomethyl)-3-methylbenzene (13.23 g, 97 %) as a yellow oil. IH NMR (300 MHz, CHLOROFORM-D): delta 7.37-7.27 (2H, m), 7.17 (IH, d, /= 8.1 Hz), 4.45 (2H, s), 2.39 (3H,s). |
97% | With phosphorus tribromide; In dichloromethane; at 0 - 20℃; | Intermediate 13: 4-bromo-1-(bromomethvl)-2-methylbenzene; To a solution of (4-bromo-2-methylphenyl) methanol, intermediate 12, (100 g, 0. 5mol) in dicholoromethane (1 L) was added dropwise phosphorus tribromine (54.2 g, 0.2 mol) at 0 0C. After addition, the reaction mixture was stirred for 2 hours at RT. The mixture was adjusted to pH=7 with a saturated solution of NaHCO3. The separated organic layer was dried over sodium sulfate, filtered, concentrated in vacuo to give the title product (4-bromo-2- methylphenyl)methanol, (128 g, 97% yield). 1H NMR: (400 MHZ, CDCI3) delta 7.43 (t, 1 H), 7.32- 7.37 (m, 2H), 4.67 (s, 2H), 2.33 (s, 3H). |
95% | With phosphorus tribromide; In chloroform; at 0 - 20℃; for 3h;Inert atmosphere; | PBr3 (14.54 g, 53.7mmol, 1.2 eq) was added to the solution of (4-bromo-2-methylphenyl)methanol (9.0 g, 44.76mmol, 1.0 eq) in CHC13 (100 mL) at 0 C under nitrogen atmosphere and the solution wasallowed to warm up to ambient temperature. The solution was, then, stirred at ambienttemperature for 3 h. After complete consumption of starting material, the reaction mixture was diluted with chloroform and washed with saturated aq NaHCO3 and brine. The organic extract was then dried over anhydrous sodium sulfate, filtered, and solvents evaporated from the filtrate under reduced pressure to afford 4-bromo-1-(bromomethyl)-2-methylbenzene (11.2 g, 95%) asyellow solid. |
89% | With phosphorus tribromide; In dichloromethane; at 0 - 20℃; for 1h; | [0653j To a solution of (4-bromo-2-methylphenyl)methanol (1.3 g, 6.7 mmol) in CH2C12 (50 mL) was added PBr3 (0.95 mL, 10 mmol) at 0 C. The mixture was stirred at rt for 1 h, quenched with ice-water (50 mL) and the pH value was adjusted to 7.0 with 50% aqueous NaOH solution. The mixture was extracted with EtOAc (100 mL x 2) and the combined organic layers were washed with water (50 mL), dried (Na2SO4) and concentrated in vacuo to give 4-bromo-1- (bromomethyl)-2-methylbenzene (1.56 g, yield: 89%) as a white solid which was used in next step without further purification. |
81% | With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 20℃; for 5h; | Triphenylphosphine (11.35 g, 43.27 mmol) followed by carbon tetrabromide (14.35 g, 43.27 mmol) were added to a solution of (4-bromo-2-methyl-phenyl)-methanol (7.25 g, 36 mmol) in CH2CI2 (200 mL). The mixture was stirred at room temperature for 5 hours. The solution was concentrated to 15 ml. The residue was purified by flash column chromotography (1% to 10% EtOAc in Hexane) gave the product as brown oil (9.25 g, 81% yield). 1H NMR (400 MHz, CDCI3) 5: 2.39 (3 H, s) 4.45 (2 H, s) 7.17 (1 H, d, J=8.08 Hz) 7.29 (2 H, m) 7.30 (1 H, dd, J=8.08, 2.02 Hz) 7.34 (1 H, s) |
With N-Bromosuccinimide; triphenylphosphine; In dichloromethane; | 4-Bromo-1-bromomethyl-2-methyl-benzene (Intermediate 138) A solution of (4-bromo-2-methyl-phenyl)-methanol (Intermediate 133, 319.0 mg, 1.58 mmol) and triphenylphosphine (466.0 mg, 1.74 mmol) in 5 mL CH2Cl2 was cooled to 0 C. and N-bromosuccinimide (309.0 mg, 1.74 mmol) was added in 5 portions over 20 minutes. The solution was warmed to 25 C. and stirred for 17 hours. The reaction was quenched by the addition of dilute aqueous NaHCO3. The resulting mixture was extracted with Et2O and the combined organic layers were washed with H2O and saturated aqueous NaCl before being dried (Na2SO4) and concentrated under reduced pressure. The title compound, 350.0 mg (84%), was isolated by column chromatography (2-3% EtOAc-hexanes) as a colorless oil. 1H NMR (CDCl3) delta: 7.32 (1H, d, J=2.0 Hz), 7.29 (1H, dd, J=2.0, 7.9 Hz), 7.15 (1H, d, J=7.9 Hz), 4.43 (2H, s), 2.37 (3H, s). | |
With triphenylphosphine; In N-Bromosuccinimide; | 4-Bromo-1-bromomethyl-2-methyl-benzene (Intermediate 138) A solution of (4-bromo-2-methyl-phenyl)-methanol (Intermediate 133, 319.0 mg, 1.58 mmol) and triphenylphosphine (466.0 mg, 1.74 mmol) in 5 mL CH2C12 was cooled to 0 C. and N-bromosuccinimide (309.0 mg, 1.74 mmol) was added in 5 portions over 20 minutes. The solution was warmed to 25 C. and stirred for 17 hours. The reaction was quenched by the addition of dilute aqueous NaHCO3. The resulting mixture was extracted with Et2O and the combined organic layers were washed with H2O and saturated aqueous NaCl before being dried (Na2SO4) and concentrated under reduced pressure. The title compound, 350.0 mg (84%), was isolated by column chromatography (2-3% EtOAc-hexanes) as a colorless oil. 1H NMR (CDCl3) delta: 7.32 (1H, d, J=2.0 Hz), 7.29 (1H, dd, J=2.0, 7.9 Hz), 7.15 (1H, d, J=7.9 Hz), 4.43 (2H, s), 2.37 (3H, s). | |
With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 20℃; | To a stirred solution of (4-Bromo-2-methyl-phenyl)-methanol (as obtained in preparation 25) (4.58 g, 22.8 mmol) in CH2CI2 (50 ml) is added , under Argon and at RT, carbon tetrabromide (9.27 g, 27.4 mmol) followed by thphenylphosphine (7.25 g, 27.4 mmol). The mixture is stirred overnight and then concentrated in vacuo. The crude residue is then purified by chromatography (silicagel, hexane: EtOAc 25:1) to afford the title compound as a clear oil. | |
With hydrogen bromide; acetic acid; In water; at 50℃; for 12h; | Step 2: 4-bromo-l-(bromomethyl)-2-methylbenzene; Hydrobromic acid (cone, 2 eq.) was added to a stirred solution of the alcohol from step 1 (1 eq.) in acetic acid (0.22M). The mixture was stirred at 50 C for 12 h, cooled down to room temperature, poured in water and extracted with Et2O. The organic extract was washed with <n="25"/>water, aqueous sodium hydrogen carbonate (3x), brine, dried over MgSO4, filtered and concentrated to afford the desired benzyl bromide as a light yellow solid. | |
With phosphorus tribromide; In dichloromethane; at 0 - 20℃; for 3h; | To a solution of (4-bromo-2-methylphenyl)methanol 132 (4 g) in DCM was added PBr3 (5.42 g) at 0 C. The mixture was stirred for 3 h at room temperature. DCM was added and washed with water and aq NaHC03 until pH ~ 7. The organic layer was separated, dried over Na2S04, and concentrated under reduced pressure to give 4-bromo- l -(bromomethyl)-2- methylbenzene 133 as a brown oil (3.8 g). The compound was used in the next reaction without further purification. ? NMR (400 MHz, CDC13) ppm: 7.37 (s, 1 H), 7.34 (d, J= 8 Hz, 1 H), 7.20 (d, J= 8 Hz, 1 H), 4.48 (s, 2H), 2.41 (s, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In water; N,N-dimethyl-formamide; at 80℃; for 72h; | Step 3: (4-bromo-2-methylphenvD acetonitrile; KCN (1.4 eq.) was added to a stirred solution of the benzyl bromide in DMF (0.22M) and a small amount of water (1%). The suspension was stirred 72h at 80 C. The reaction was monitored by NMR of small aliquots. The final mixture was cooled down to room temperature, poured in water and extracted with Et2theta. The organic extract was washed with water (2x), brine, dried over MgSO4, filtered and concentrated. The residue was purified by column chromatography on silica gel, eluting with Hexane/EtOAc (5 then 10%) to give the title compound III.l as a yellow solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE XIV 4-Bromo-2-methylbenzyl bromide STR24 The title compound is obtained from 10 g (49.7 mmol) of the compound from Example XII analogously to the instructions of Example XLIX. Yield: 10.9 g (83% of theory) Rf: 0.8 (petroleum ether/ethyl acetate=10:1) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
93% | In water; N,N-dimethyl-formamide; at 0 - 20℃; | Step c intermediate 522-(4-bromo-2-methylphenyl)acetonitrilel-Bromo-4-(bromomethyl)-3-methylbenzene (13.2 g, 50.1 mmol) is dissolved in DMF (65 mL). The reaction mixture is cooled to 0-50C and NaCN (3.66 g, 74.6 mmol) is added follow by water (8 mL). The reaction is stirred overnight at room temperature and water (170 mL) is added followed by NaHCO3 sat. (130 mL) and hexane/Et2O (2:1) (150 mL). The organic phase is separated and the aqueous phase extracted with hexane / Et2O (2:1) (3 x 150 mL). The combined organic phases are washed with water (170 mL), dried over MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-2-methylphenyl)acetonitrile (9.76 g, 93 %) as an orange oil. IH NMR (300 MHz, CHLOROFORM-D): delta 7.40-7.32 (2H, m), 7.23 (2H, d, /= 8.2 Hz), 3.61 (2H, s), 2.32 (3H, s). |
92.7% | In water; N,N-dimethyl-formamide; at 20℃; | To a solution of 4-bromo-1-bromomethyl-2-methyl-benzene (3.96 g, 15 mmol) dissolved in DMF (16. mL)( were, a'dd^jspdjum cyanide (0.85 g, '17.25 mmol) and waler (1.8 ml). The reaction was sti'rred for oye'rriigh't at room temperature. To the reaction was added 1 00 ml water; 80 mL saturated NaHCO3, and 100 mL EtOAc. The layers were separated, and the aqueous layer was extracted with 3 x 100 mL EtOAc. The combined organics were washed with 100 mL water, and then dried over Na2SO4. After filtering off the solids, the mother liquor was concentrated to the desired product by rotary evaporation (2.92 g, 92.7% yield). 1H NMR (400 MHz, CDCI3): 6 2.32 (2 H, s), 3.62 (1 H, s), 7.20-7.27 (1 H, m), 7.32-7.41 (1 H, m). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Description 241 : 1-[6-( 2-(2-methyl-4-bromobenzyloxy)-phenyl)pyridin-2-yl]-2- methyl-pyrrole-3-carboxylic acid (D241); To a solution of Ethyl 1-[6-( 2-hydroxy-phenyl)pyridin-2-yl]-2-methyl-pyrrole-3-carboxylate (D56g, 0.6g, 2 mmol) in CH3CN (20 ml), <strong>[156001-49-9]4-bromo-2-methylbenzyl bromide</strong> D44c (0. 647g, 2.45 mmol) and Cs2CO3 (0.79g, 2.45 mmol, 1.2 eq) were added. The mixture was refluxed for I Ohours and then poured into water, extracted with CH2CI2 and dried over Na2SO4. The organic phase was concentrated under reduced pressure to leave a yellow oil which was dissolved in EtOH (70ml )and a few drops of THF. 1 N NaOH solution was added (6ml_, 5.85 mmol) and the mixture was heated at 700C for 48hours. After evaporation of the organic solvents in vacuo, the reaction mixture was acidified to pH= 5 with 1 N HCI solution. The resulting precipitate was filtered, washed with water and dried to give the title compound as a cream powder (0.56g, 62.9%). LC/MS: 479 (M+H) Rt = 3.54 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
93% | With caesium carbonate; In acetonitrile; at 70℃; for 4h; | Intermediate 27: ethyl 1 -[4-(2-[(4-bromo-2-methylphenyl)methyl]oxy}-5-methylphenyl)- 1,3-thiazol-2-yl]-4-piperidinecarboxylate; To a solution of ethyl 1-[4-(2-hydroxy-5-methylphenyl)-1 ,3-thiazol-2-yl]-4-piperidinecarboxylate, intermediate 9, (400 mg, 1.155 mmol), in acetonitrile (20 ml.) were added cesium carbonate (1129 mg, 3.46 mmol) and <strong>[156001-49-9]4-bromo-1-(bromomethyl)-2-methylbenzene</strong>, intermediate 13, (320 mg, 1.212 mmol). The reaction mixture was stirred at 700C for 4 hours before being cooled and filtrated. The filtrate was concentrated under reduced pressure and the crude product was purified by flash chromatography (dichloromethane/cHex 30/70 and dichloromethane) to give the title compound ethyl 1-[4-(2-[(4-bromo-2-methylphenyl)methyl]oxy}-5-methylphenyl)-1 ,3- thiazol-2-yl]-4-piperidinecarboxylate (570 mg, 1.077 mmol, 93 %) as a white solid. LCMS : (M+H)+= 530, Rt= 4.68 min. 1H NMR (CDCI3) £7.95 (d, 1 H), 7.35-7.2 (m, 3H), 7 (s, 1 H), 6.95 (dd, 1 H), 6.8 (d, 1 H), 4.9 (s, 2H), 4.1 (q, 2H), 3.95 (m, 2H), 3.05 (m, 2H), 2.45 (m, 1 H), 2.3 (s, 3H), 2.25 (s, 3H), 1.95 (m, 2H), 1.85-1.7 (m, 2H), 1.2 (t, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | Description 19: Ethyl 1-(4-( 5-chloro-2-(4-bromo-2-methylbenzyloxy)-phenyl)pyrimidin- 2-yl)-5-trifluoromethyl-pyrazole-4-carboxylate (D19); To a solution of ethyl 1-(4-(5-chloro-2-hydroxyphenyl)pyrimidin-2-yl)-5-trifluoromethyl- pyrazole-4-carboxylate (D14a, 1g, 2.42mmol) in acetone (80ml), was added Cs2CO3 (1.18g, 3.63mmol) and the mixture was stirred at room temperature for 15 minutes. Intermediate x (0.64g, 2.42mmol) was then added and the mixture was heated under reflux overnight, then cooled and the salts were filtered off. The filtrate was concentrated under reduced pressure and the residue was triturated with iPr2O. The resulting precipitate was filtered and dried. The title compound was obtained as a white powder (0.95g, yield= 66%). LC/MS: 597.2 (M+H), Rt= 4.48min. 1H NMR (CDCI3, ppm) : 8.8 (d, 1 H), 8.21 (bs, 2H), 8.08 (d, 1 H), 7.47 to 7.36 (m, 3H), 7.22 (d, 1 H), 7.06 (d, 1 H), 5.12 (s, 2H), 4.42 (q, 2H), 2.31 (s, 3H), 1.43 (t, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97.7% | Description 20: Ethyl 1-(4-( 2-(4-bromo-2-methylbenzyloxy)-phenyl)pyrimidin-2-yl)-5- trifluoromethyl-pyrazole-4-carboxylate (D20); To a solution of 2-chloro-4-(2-hydroxyphenyl)pyrimidine (D9, 2g, 5.29mmol) in acetone (80ml), was added Cs2CO3 (2.59g, 7.94mmol) and the mixture was stirred at room temperature for 15 minutes. <strong>[156001-49-9]4-bromo-2-methyl-benzyl bromide</strong> (D6n, 1.54g, 5.82mmol) was then added and the mixture was heated under reflux overnight and poured into water. After extraction with CH2CI2, the organic phase was dried (Na2SO4) and concentrated under reduced pressure. The residue was purified by chromatography on silicagel (CH2CI2 then CH2CI2/Me0H, 99/1 ). The title compound was obtained as a yellow oil (2.9g, yield= 97.7%). LC/MS: 562.8 (M+H), Rt= 4.26min. 1H NMR (CDCI3, ppm) : 8.8 (d, 1 H), 8.25 (s+d, 2H), 8.1 (d, 1 H), 7.55 (t, 1 H), 7.4 (m, 2H), 7.25 (d, 1 H), 7.2 (t, 1 H), 7.15 (d, 1 H), 5.15 (s, 2H), 4.4 (q, 2H), 2.35 (s, 3H), 1.4 (t, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With caesium carbonate; In acetone; at 20℃; for 16h; | A mixture of 1-59 (1.3 mmol, 0.44 -g), R-58 (1.6 mmol, 0.42 g), and Cs2C03 (2.6 mmol, 0.86 g) is dissolved in acetone (10 mL) and stirred at ambient temperature for 16 h. The mixture is filtered and then concentrated under reduced pressure to give title intermediate which is used without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With tetrabutylammomium bromide; In dichloromethane; water; at 0 - 20℃; for 16h; | To a solution of 4-bromo- l -(bromomethyl)-2-methylbenzene 133 (3.8) in a mixture of DCM and water was added TBAB and KCN (2.94 g) at 0 C. The mixture was stirred for 16 h at room temperature. DCM was added and the mixture was washed with water and saturated aq NaHCCh. The organic layer was separated, dried over Na2S04, and concentrated under reduced pressure to afford 2-(4-bromo-2-methylphenyl)acetonitrile 134 as a brown solid (2.9 g). The compound was used in the next reaction without further purification. LCMS: m/z 210 (M+l )+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
463 mg | With potassium carbonate; In N,N-dimethyl-formamide; at 20℃; for 16h; | To a solution of 4-cyclopropyl-l-oxa-4,9-diazaspiro[5.5]undecan-3-one hydrochloride (0.398 g) in DMF (5 mL) was added 4-bromo-l-(bromomethyl)-2-methylbenzene (0.5 g) and anhydrous potassium carbonate (0.524 g). The reaction flask was capped with needle septa ventilation and stirred at ambient temperature for 16 h. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over sodium sulfate, and evaporated under reduced pressure to afford the crude title product (463 mg), which was used without further purification. MS(ES)+ m/e 394.7 [M+H]+. |
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