Hydrochloric Acid → 10-[(3RS,4RS)-3-ethyl-7-hydroxy-3-(4-hydroxyphenyl)thiochroman-4-yl]-2-(7,7,8,8,8-pentafluoro-octyl)decanoic acid

Participants

Reaction Steps

A solution of sodium hydroxide (325 mg) in water (4 ml) was added to a solution of ethyl 10-[(3RS,4RS)-3-ethyl-7-hydroxy-3-(4-hydroxyphenyl)thiochroman-4-yl]-2-(7,7,8,8,8-pentafluorooctyl)decanoate (558 mg, 0.81 mmol) in ethanol (8 ml). The reaction mixture was heated under reflux for 12 hours. Dilute hydrochloric acid was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer was washed with water and saturated aqueous sodium chloride, and then dried over anhydrous magnesium sulfate. After distilling off the solvent, the residue was purified by silica gel flash column chromatography (eluent: hexane/ethyl acetate=2/1) to give 10-[(3RS,4RS)-3-ethyl-7-hydroxy-3-(4-hydroxyphenyl)thiochroman-4-yl]-2-(7,7,8,8,8-pentafluoro-octyl)decanoic acid (480 mg, Yield 89%).

Provenance & Evidence