Potassium Hydroxide → Rac-(3-chloro-4-methanesulfonyl-phenyl)-cyclopentyloxy-acetic acid

Participants

Reaction Conditions

Reaction Steps

A solution of rac-(3-chloro-4-methanesulfonyl-phenyl)-cyclopentyloxy-acetic acid methyl ester (395 mg, 1.14 mmol) in ethanol (15 mL) at 25° C. was treated with a solution of potassium hydroxide (320 mg, 5.69 mmol) in water (3 mL) and the mixture was stirred at 25° C. After 3 h, the reaction was diluted with water and evaporated under reduced pressure. The concentrate was acidified to pH 2 with an aqueous solution of 1N hydrochloric acid and extracted with dichloromethane (3×15 mL). The combined organic extracts were dried over sodium sulfate, filtered and evaporated in vacuo. The residual oil was purified by flash chromatography (Merck Silica gel 60, 230-400 mesh, 50/50 hexanes/ethyl acetate plus 1% acetic acid) to furnish rac-(3-chloro-4-methanesulfonyl-phenyl)-cyclopentyloxy-acetic acid (364 mg, 96% yield) as a colorless oil: EI-HRMS m/e calcd for C14H17ClSO5 (M+) 332.0485, found 332.0486.

Provenance & Evidence