Potassium tert-butoxide → 1-[(4-Hydroxypiperidin-1-yl)carbonyl]-5-[4-(2,2,2-trifluoroethyl)phenyl]piperidine-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of 733 mg (1.71 mmol) of the compound from Example 57A in methanol (32 ml) were added, at RT, 1.92 g (17.1 mmol) of potassium tert-butoxide. The mixture was stirred at 60° C. for 5 h. For workup, the methanol was removed under reduced pressure, and the residue was admixed with water and 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: 735 mg (99% of theory)

Provenance & Evidence