反应详情

温度

25 °C

A solution of (3-chloro-4-methanesulfonyl-phenyl)-diazo-acetic acid methyl ester (489 mg, 1.69 mmol) in dichloromethane (10 mL) at 25° C. was treated with cyclopentanol (0.38 mL, 4.23 mmol) followed by rhodium (II) acetate dimer (15 mg, 0.034 mmol). After the resulting solution was stirred at 25° C. for 1 h, it was diluted with dichloromethane (10 mL), poured into water (15 mL) and extracted with dichloromethane (3×10 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The product was purified by chromatography (Biotage Flash 40S column, 75/25 hexanes/ethyl acetate) to afford rac-(3-chloro-4-methanesulfonyl-phenyl)-cyclopentyloxy-acetic acid methyl ester (395 mg, 67% yield) as a colorless oil: EI-HRMS m/e calcd for C15H19ClSO5 (M) 346.0642, found 346.0643.

1. extractionextracted with dichloromethane (3×10 mL)
2. dry with materialThe combined organic extracts were dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe product was purified by chromatography (Biotage Flash 40S column, 75/25 hexanes/ethyl acetate)