Potassium Permanganate → (2R)-2-[3-Chloro-4-(methanesulfonyl)phenyl]-3-(2-oxocyclopentyl)propanoic acid

Participants

Reaction Conditions

Reaction Steps

A solution of potassium permanganate (101 mg, 0.64 mmol) in water (1.83 mL) was treated with a solution of 2(R)-(3-chloro-4-methanesulfinyl-phenyl)-3-(2-oxo-cyclopentyl)-propionic acid (191.5 mg, 0.58 mmol) in methanol (5.8 mL). The reaction was stirred at 25° C. for 1 h. At this time, the reaction was diluted with methanol and then was filtered through a pad of celite. The filtrate was concentrated in vacuo and was azeotroped with acetonitrile. Flash chromatography (Merck Silica gel 60, 230–400 mesh, 90/10 methylene chloride/methanol with glacial acetic acid) afforded 2(R)-(3-chloro-4-methanesulfonyl-phenyl)-3-(2-oxo-cyclopentyl)-propionic acid (87 mg, 43%) as an off-white foam: EI-HRMS m/e calcd for C15H17ClO5S (M−H2O)+ 326.0379, found 326.0378.

Provenance & Evidence