Structure of 72605-86-8
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CAS No. : | 72605-86-8 |
Formula : | C5H4ClNO2S |
M.W : | 177.61 |
SMILES Code : | ClC1=NC=C(S1)C(=O)OC |
MDL No. : | MFCD09265500 |
InChI Key : | ITGAFIAWKUGNIJ-UHFFFAOYSA-N |
Pubchem ID : | 12897294 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H332-H335 |
Precautionary Statements: | P261-P280-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 5 |
Fraction Csp3 | 0.2 |
Num. rotatable bonds | 2 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 38.4 |
TPSA ? Topological Polar Surface Area: Calculated from |
67.43 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.0 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.1 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.58 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.29 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.59 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.71 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.5 |
Solubility | 0.559 mg/ml ; 0.00315 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.15 |
Solubility | 0.127 mg/ml ; 0.000714 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-1.98 |
Solubility | 1.84 mg/ml ; 0.0104 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
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) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
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 |
-5.89 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 |
0.0 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) |
2.57 |
* 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 n-Amyl nitrite; copper dichloride; In acetonitrile; at 50℃; for 2h; | To a preheated (50 C.) slurry of copper (II) chloride (932 mg), 10 mL of acetonitrile was added, along with the thiazole aminoester (1 g) and amyl nitrite (737 mg). The mixture was heated at 50 C. for 2 h. The resulting mixture was concentrated and purified by Biotage (5-10% ethyl acetate in hexane) to give the chloride as a brown solid. | |
With sodium nitrite; In hydrogenchloride; water; Petroleum ether; | EXAMPLE I Preparation of Methyl 2-chlorothiazole-5-carboxylate To 5.0 g of <strong>[6633-61-0]methyl 2-aminothiazole-5-carboxylate</strong> [H. E. Faith, U.S. Pat. No. 2,405,820(1946)] suspended in 54 ml of 6 N hydrochloric acid stirred at-5-0 was added dropwise over 15 minutes 3.7 g of sodium nitrite dissolved in 10 ml of water. After stirring 5 minutes, the brown suspension was added in one portion to a rapidly stirred suspension of 10.6 g of cupric sulfate and 10.6 g of sodium chloride cooled at 5. The cooling bath was removed and stirring was continued for 30 minutes. The pH was adjusted to 7.3 with 6 N sodium hydroxide and the green suspension was filtered through Celite. The solid was washed with three portions of ethyl acetate and the extract was combined with the ethyl acetate extract of the original filtrate. After drying the combined extract over magnesium sulfate, concentration in vacuo gave a brown solid. Trituration with four portions of hot petroleum ether (35-60) served to separate the soluble product from some starting material. Concentration in vacuo of the petroleum ether solution gave 3.9 g. of pure methyl 2-chlorothiazole-5-carboxylate having a melting point of 41-46. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
To 4-iodopyrazole (715 mg) in 15 mL of THF was added NaH (161 mg, 60%) at 0 C. After 30 min, to this mixture was added the chloride intermediate (595 mg). After 30 min at 0 C., the mixture was warmed to RT and stirred for 8 h. The mixture was quenched with water and extracted with ethyl acetate. The organic layer contained some white solid which is pure biaryl product, and was collected by filtration. The filtrate was concentrated and further purified by Biotage (20-100% ethyl acetate in hexane) to give additional biaryl product as a white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
34% | In ethanol; for 3h;Heating / reflux; | 10.0 g (116.09 mmol) of anhydrous piperazine were added to a solution of 4.2 g (23.647 mmol) of <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> in 5 ml of ethanol and refluxed for 3 hours. The reaction mixture was combined with saturated aqueous sodium hydrogen carbonate solution and exhaustively extracted with ethyl acetate. The combined organic extracts were washed thoroughly with water, dried over sodium sulphate and concentrated by evaporation in vacuo. 1.8 g (34% of theory) of colourless crystals were obtained, Rf 0.44 (EI D). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
34% | 20 g of crushed ice were added to a suspension of 14.0 g (71.927 mmol) of methyl 2-aminothiazol-5-carboxylate hydrochloride in 8 ml of conc. hydrochloric acid and while cooling externally a solution of 5.0 g (72.464 mmol) of sodium nitrite in 30 ml of water was added dropwise, while the reaction temperature was kept below 0 C. at all times. After 30 minutes 7.2 g (72.735 mmol) of copper (I) chloride were added, the mixture was stirred for another hour while being cooled and in the following 1½ hours allowed to come slowly up to room temperature. The mixture was exhaustively extracted with diethyl ether, the combined extracts were washed with saturated saline solution, dried over sodium sulphate and evaporated down. 4.3 g (34% of theory) of a colourless oil were obtained, Rf=0.94 (EI D), which was used in the next steps without any further purification. [0524] MS: M+=177/179 (Cl) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
at 100℃; for 4h; | Methyl 2-anilino-1,3-thiazole-5-carboxylate (4-3); 2-Chlorothiazole (0.670 g, 5.60 mmol) was dissolved in 10 mL of anhydrous tetrahydrofuran under Ar and the resulting solution was cooled to -78 C. n-Butyllithium (2.5 M in hexane, 2.46 mL, 6.16 mmol) was added dropwise. After 15 minutes, methyl chloroformate (0.650 mL, 8.40 mmol) was added. After 30 minutes the reaction was allowed to warm to ambient temperature and was quenched by the addition of half-saturated aqueous NHCl. The resulting mixture was extracted 3× with dichloromethane and the organic extracts were dried over Na2SO4, filtered and concentrated. 1H NMR showed pure <strong>[72605-86-8]methyl 2-chloro-1,3-thiazole-5-carboxylate</strong> (4-2). 2-Chloro-1,3-thiazole-5-carboxylate (4-2, 0.713 g, 4.01 mmol) was stirred with aniline (1.83 mL, 20.1 mmol) and the mixture was heated to 100 C. After 4 hours the reaction was cooled, diluted with ethyl acetate and washed with 0.5 M aqueous HCl. The aqueous phase was extracted 2× with ethyl acetate and the combined organic extracts were dried over Na2SO4, filtered and concentrated. The residue was purified by flash column chromatography to afford the title compound. 1H NMR (CDCl3) delta 7.96 (s, 1H), 7.69 (bs, 1H), 7.41 (t, 2H, J=8.6 Hz), 7.35 (d, 2H, J=8.8 Hz), 7.17 (t, 1H, J=7.2 Hz), 3.85 (s, 3H). MS [M+H]+=235.0. mp=175-176 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 8 Methyl 7-methoxy-5H-thiazolo-(2,3-b)-quinazolin-5-one-2-carboxylate 16.5 g of 5-methoxyanthranilamide and 18.64 g of <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> were stirred for 11/2 hours at 160 C. After working up in the conventional manner 24.7 g (85%) of the above compound was obtained; m.p. 187-192 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide; potassium iodide; sodium hydrogencarbonate; In methanol; water; acetic acid; | EXAMPLE 2 Preparation of 7-Methoxy-5-oxo-5H-thiazolo[2,3-b]quinazoline-2-carboxylic acid An intimate mixture of 1.49 g of 5-methoxyanthranilic acid, 1.58 g of <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> and 0.075 g of powdered potassium iodide was stirred and heated in an oil bath at 160-165 for 80 minutes. The resultant dark solid was treated with 75 ml of a saturated solution of sodium bicarbonate and extracted with three portions of chloroform. The combined, dried (over magnesium sulfate) extract was concentrated in vacuo to a tan solid (1.59 g). Crystallization from methylene chloride-ether gave 0.86 g of methyl 7-methoxy-5-oxo-5H-thiazolo[2,3-b]quinazoline-2-carboxylate, having a melting point of 186-192 C. This methyl ester was hydrolyzed by stirring for 16 hours at room temperature with 30 ml of 1 N sodium hydroxide and 30 ml of methanol. After filtration, the filtrate was acidified with acetic acid to pH5 and concentrated in vacuo. Water was added and the solid was removed by filtration. Since the base treatment also opens the lactam, this solid was refluxed for 1 hour in 75 ml of acetic acid. After concentration to 25 ml, the product crystallized on cooling and was filtered to give 0.53 of pure 7-methoxy-5-oxo-5H-thiazolo[2,3-b]quinazoline-2-carboxylic acid having a melting point of 247-247.5 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Methyl 2-anilino-1,3-thiazole-5-carboxylate (4-3); 2-Chlorothiazole (0.670 g, 5.60 mmol) was dissolved in 10 mL of anhydrous tetrahydrofuran under Ar and the resulting solution was cooled to -78 C. n-Butyllithium (2.5 M in hexane, 2.46 mL, 6.16 mmol) was added dropwise. After 15 minutes, methyl chloroformate (0.650 mL, 8.40 mmol) was added. After 30 minutes the reaction was allowed to warm to ambient temperature and was quenched by the addition of half-saturated aqueous NHCl. The resulting mixture was extracted 3× with dichloromethane and the organic extracts were dried over Na2SO4, filtered and concentrated. 1H NMR showed pure methyl 2-chloro-1,3-thiazole-5-carboxylate (4-2). 2-Chloro-1,3-thiazole-5-carboxylate (4-2, 0.713 g, 4.01 mmol) was stirred with aniline (1.83 mL, 20.1 mmol) and the mixture was heated to 100 C. After 4 hours the reaction was cooled, diluted with ethyl acetate and washed with 0.5 M aqueous HCl. The aqueous phase was extracted 2× with ethyl acetate and the combined organic extracts were dried over Na2SO4, filtered and concentrated. The residue was purified by flash column chromatography to afford the title compound. 1H NMR (CDCl3) delta 7.96 (s, 1H), 7.69 (bs, 1H), 7.41 (t, 2H, J=8.6 Hz), 7.35 (d, 2H, J=8.8 Hz), 7.17 (t, 1H, J=7.2 Hz), 3.85 (s, 3H). MS [M+H]+=235.0. mp=175-176 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78.4% | 60% sodium hydride (12.0 g, 0.30 mol) was suspended in THF (300 mL) and cooled down to 0 C. 4-amino-6-bromo-2-methylpyrimidine (Compound 9) (18.7 g, 0.1 mol) was then added in batches and stirred for 30 min. After <strong>[72605-86-8]methyl 2-chlorothiazole-5-formate</strong> (Compound 10) (17.7 g, 0.1 mol) was added in batches, the reactants were heated and reacted by refluxing for 4 h, and then cooled down to room temperature for reaction overnight. When controlling the temperature between 0 C. and 5 C., hydrochloric acid (2N) was added for neutralization reaction. After adding keep heat and stirred to grow grains for 1 h. Filtrate and wash the cake with water, and then dry to give target Compound 11 (25.8 g, yield is 78.4%).[0177]Element analysis: C10H9BrN4O2S, Calculated: C, 36.49; H, 2.76; N, 17.02. Found: C, 36.51; H, 2.77; N, 16.99.[0178]1H-NMR (500 MHz, DMSO-d6): delta(ppm) 2.580 (s, 3H), 3.820 (s, 3H), 6.960 (S, 1H), 8.160 (s, 1H), 12.376 (s, 1H) (which disappeared after exchanging D2O)[0179]13C-NMR (500 MHz, DMSO-d6): delta(ppm) 25.700, 52.800, 104.161, 121.662, 146.010, 157.910, 159.124, 162.412, 162.949, 167.871. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | Example G[0161] 2-(2-o-Tolyl-chroman-6-yloxy)-thiazole-5-carboxylic acid methyl ester [0162] A suspension of 2-o-Tolyl-chroman-6-ol (2.5 g, 10.4 mmol), <strong>[72605-86-8]methyl 2-chloro-thiazole-5-carboxylate</strong> (1.9 g, 10.6 mmol, 1.02 eq) and potassium carbonate (1.9 g, 1.3 eq) in dimethylformamide (30 ml) was stirred at 50?C for 10 h. The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers washed with water, dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate/heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | Example G2-(2-o-Tolyl-chroman-6-yloxy)-thiazole-5-carboxylic acid methyl ester A suspension of 2-o-Tolyl-chroman-6-ol (2.5 g, 10.4 mmol), <strong>[72605-86-8]methyl 2-chloro-thiazole-5-carboxylate</strong> (1.9 g, 10.6 mmol, 1.02 eq) and potassium carbonate (1.9 g, 1.3 eq) in dimethylformamide (30 ml) was stirred at 50 C. for 10 h. The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers washed with water, dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate/heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | Example G2-(2-o-Tolyl-chroman-6-yloxy)-thiazole-5-carboxylic acid methyl esterA suspension of 2-o-Tolyl-chroman-6-ol (2.5 g, 10.4 mmol), methyl 2-chloro-thiazole- 5-carboxylate (1 .9 g, 10.6 mmol, 1 .02 eq) and potassium carbonate (1 .9 g, 1.3 eq) in dimethylformamide (30 ml) was stirred at 50C for 10 h. The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers washed with water, dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate/heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | Example G2-(2-o-Tolyl-chroman-6-yloxy)-thiazole-5-carboxylic acid methyl esterA suspension of 2-o-Tolyl-chroman-6-ol (2.5 g, 10.4 mmol), methyl 2-chloro-thiazole- 5-carboxylate (1 .9 g, 10.6 mmol, 1 .02 eq) and potassium carbonate (1 .9 g, 1.3 eq) in dimethylformamide (30 ml) was stirred at 50C for 10 h. The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers washed with water, dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate/heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | A suspension of 2-o-Tolyl-chroman-6-ol (2.5 g, 10.4 mmol), methyl 2-chloro-thiazole- 5-carboxylate (1 .9 g, 10.6 mmol, 1 .02 eq) and potassium carbonate (1 .9 g, 1 .3 eq) in dimethylformamide (30 ml) was stirred at 50C for 10 h. The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers washed with water, dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate/heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
98% | With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 10h; | 2-o-tolyl-chroman-6-ol (2.5 g, 10.4 mmol)2-chloro-thiazole-5-carboxylate(1.9 g, 10.6 mmol, 1.02 equiv.) And potassium carbonate (1.9 g, 1.3 equiv.) In dimethylformamide (30 ml) at 50 C for 10 h.The suspension was cooled to room temperature and diluted with water. The aqueous layer was extracted with ethyl acetate and the combined organic layers were washed with water, dried over sodium sulfate, filtered, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography (silica gel; ethyl acetate / heptane gradient). The product was obtained as a pale yellow solid (3.87 g, 98%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A solution of a mixture of 2-chloropyrimidin-4-amine (5.0 g, 38.5 mmol) and <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> (6.85 g, 38.5 mmol, 1 equivalent (eq)) in dry N,N- dimethylformamide (75 ml) was cooled to 0 C and was treated portionwise over 5 min with sodium hydride (60% w/w in mineral oil, 3.1 g, 76.9 mmol, 2 eq). The reaction mixture was stirred at 0 C for 1 h and warmed to ambient temperature for a further 1 h. The mixture was treated with saturated ammonium chloride, followed by saturated aqueous Na2C03 solution to reach pH 9, and the resulting mixture was extracted with 1: 1 mixture of dichloromethane and ethyl acetate. The organic extracts were combined, dried using a hydrophobic frit, and evaporated under reduced pressure. The residue was purified by chromatography on silica to afford the title compound as an off-white solid. LCMS retention time (RT): 2.70 (Method A), Mass mlz: 270.99 (M+l). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A solution of a mixture of 2-chloropyrimidin-4-amine (730 mg, 3.2 mmol) and <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> (626 mg, 3.5 mmol, 1.1 eq) in dry N,N- dimethylformamide (15 ml) was cooled to 0 C and was treated portionwise over 5 min with sodium hydride (60% w/w in mineral oil, 256 mg, 6.4 mmol, 2 eq). The reaction mixture was stirred at 0 C for 1 h and warmed to ambient temperature for a further 1 h. The mixture was treated with saturated ammonium chloride, followed by saturated aqueous Na2C03 solution to reach pH 9 and the product was extracted with 1 : 1 mixture of dichloromethane and ethyl acetate. The organic extracts were combined, dried using a hydrophobic frit and evaporated under reduced pressure. The residue was purified by chromatography on silica to afford the title compound as an off-white solid. LCMS RT: 2.07 (Method A), Mass m/z 370.37 (M+l). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In acetonitrile; at 82℃; for 16h; | Compound 6 (1.50 g, 6.54 mmol),<strong>[72605-86-8]2-chlorothiazole-5-carboxylic acid methyl ester</strong> (1.16 g, 6.54 mmol) andPotassium carbonate (903.96 mg, 6.54 mmol)Soluble in 10mL acetonitrile,The reaction was stirred at 82 C. for 16 hours and the solvent was recovered under reduced pressure to give compound 9. | |
With potassium carbonate; In acetonitrile; at 82℃; for 16h; | General procedure: A mixture of compounds 12a-c (6.5 mmol, 1.0 eq), methyl2-chlorothiazole-5-carboxylate (1.2 g, 6.5 mmol, 1.0 eq),and K2CO3 (904.0 mg, 6.5 mmol, 1.0 eq) in CH3CN(10.0 mL) was stirred at 82 C for 16 h. The mixture wasconcentrated to give the crude compounds 13-15, whichwas put into next step without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
30% | With potassium carbonate; In N,N-dimethyl-formamide; at 70℃; for 4h;Inert atmosphere; | A mixture of <strong>[72605-86-8]methyl 2-chlorothiazole-5-carboxylate</strong> (2.1 3 g, 1 2.0 mmol) and 3,5- dichloropyridine-4-thiol (2.38 g, 14.4 mmol) in DMF (48 imL) was treated with K2CO3 (3.65 g, 26.4 mmol). The reaction mixture was stirred at 70QC for 4 h. The reaction was cooled to room temperature, quenched with H2O, and extracted with EA. The combined organic extracts were washed with H2O and brine, dried over Na2SO4. The solvent was removed and the residue was purified by flash column (Hex:EA = 1 0:1 ) to afford 1 .23 g (30%) of methyl 2-((3,5-dichloropyridin-4-yl)thio)thiazole-5-carboxylate as a yellow solid.0.50 (Hex:EA = 4:1 ); HRMS (ESI) (m/z) [MH]+calcd for C10H7CI2N2O2S2, 320.9326, found 320.9433. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52% | With N-ethyl-N,N-diisopropylamine; In N,N-dimethyl acetamide; at 120℃; for 3.5h;Inert atmosphere; | Weigh 3-((5-cyclopropyl-3-(2-(trifluoromethyl)phenyl)isoxazol-4-yl)methoxy)-1-oxa-8-azaspiro[ 4.5] decane (200 mg, 0.64 mmol) and methyl 2-chlorothiazol-5-carboxylate (75 mg, 0.58 mmol) in a 50 mL three-necked flask Under nitrogen protection, DMA (5 mL), and then DIPEA (207 mg, 1.6 mmol), reacted at 120 C for 3.5 h.After cooling to room temperature, the reaction system was poured into water, extracted with EA three times, and the organic layers were combined and washed with water and brine.Drying with anhydrous Na2SO4, the crude product obtained by concentration was purified by column chromatography (PE/EA=5/1)The title compound (238 mg, yield: 52%) was obtained by isolation and purification.It is a white oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In acetonitrile; at 82℃; for 16h; | General procedure: A mixture of compounds 12a-c (6.5 mmol, 1.0 eq), methyl2-chlorothiazole-5-carboxylate (1.2 g, 6.5 mmol, 1.0 eq),and K2CO3 (904.0 mg, 6.5 mmol, 1.0 eq) in CH3CN(10.0 mL) was stirred at 82 C for 16 h. The mixture wasconcentrated to give the crude compounds 13-15, whichwas put into next step without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In acetonitrile; at 82℃; for 16h; | General procedure: A mixture of compounds 12a-c (6.5 mmol, 1.0 eq), methyl2-chlorothiazole-5-carboxylate (1.2 g, 6.5 mmol, 1.0 eq),and K2CO3 (904.0 mg, 6.5 mmol, 1.0 eq) in CH3CN(10.0 mL) was stirred at 82 C for 16 h. The mixture wasconcentrated to give the crude compounds 13-15, whichwas put into next step without further purification. |
A257681 [81449-93-6]
Ethyl 2-chlorothiazole-5-carboxylate
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