Potassium tert-butoxide → 1-Acetyl-5-[4-(2,2-difluoroethyl)phenyl]piperidine-3-carboxylic acid

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Reaction Conditions

Reaction Steps

410 mg (3.65 mmol) of potassium tert-butoxide were added at RT to a solution of 205 mg (0.365 mmol, purity 61%) of the compound from Example 58A in methanol (6.9 ml). The mixture was stirred at 60° C. overnight. For workup, the methanol was removed under reduced pressure, the residue was admixed with water and the mixture was acidified (pH 1) with aqueous 1 N hydrochloric acid solution. The mixture was extracted with ethyl acetate, and the organic phase was dried with magnesium sulphate, filtered and concentrated under reduced pressure. Yield: 153 mg (67% of theory, purity 50%)

Provenance & Evidence