反应详情

温度

0 °C

To a solution of water (1 mL) and tetrahydrofuran (1 mL) was added mercuric acetate (83.0 mg, 0.277 mmol, 1 eq) at room temperature. After stirring 10 min, the yellow solution was cooled to 0° C. and a solution of 3-[(4-Methyl-cyclohexanecarbonyl)-(4-methylene-cyclohexyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester (125 mg, 0.277 mmol, 1 eq) was added dropwise. The resulting mixture was stirred 1 h at 0° C. NaOH 3M (1 mL) was then added, followed by sodium borohydride (10.0 mg, 0.277 mmol, 1 eq) and the reaction mixture was stirred 15 min at room temperature. The reaction mixture was extracted with dichloromethane (3×30 mL). Organic phases were combined, dried over sodium sulfate and concentrated. The crude was purified by chromatography (50% ethyl acetate/hexanes) and diastereoisomers were separated to give 90 mg of cis-3-[(4-Hydroxy-4-methyl-cyclohexyl)-(4-methyl-cyclohexanecarbonyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester and 6.5 mg of trans-3-[(4-Hydroxy-4-methyl-cyclohexyl)-(4-methyl-cyclohexanecarbonyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester (74%), both as a white solid. cis-3-[(4-Hydroxy-4-methyl-cyclohexyl)-(4-methyl-cyclohexanecarbonyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester. NMR 1H (CDCl3, 400 MHz): 7.63 ppm (d, 2H); 7.40 ppm (m, 3H); 6.98 ppm (s, 1H); 4.50 ppm (tt, 1H); 3.85 ppm (s, 3H); 2.00 ppm (m, 1H); 1.80-1.20 ppm (m, 15H); 1.18 ppm (s, H); 0.78 ppm (d, 3H); 0.64 ppm (m, 2H).

1. stirringThe resulting mixture was stirred 1 h at 0° C
2. stirringthe reaction mixture was stirred 15 min at room temperature
3. extractionThe reaction mixture was extracted with dichloromethane (3×30 mL)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated
6. customThe crude was purified by chromatography (50% ethyl acetate/hexanes) and diastereoisomers
7. customwere separated