Trifluoroacetic acid → (2-Phenyl-piperidin-1-yl)-piperidin-3-yl-methanone

Participants

Reaction Steps

To a solution of 1 g 3-(2-phenyl-piperidine-1-carbonyl)-piperidine-1-carboxlic acid tert.-butyl ester in DCM (15 mL) was added 40% trifluoroacetic acid in DCM (6 mL). The mixture was stirred at room temperature for 4-5 h. After completion of the reaction all volatiles were evaporated, water (20 mL) was added and the mixture extracted with (2×25 mL) diethyl ether. The aqueous layer was adjusted with 10% aq. NaOH to pH=12, and extracted with ethyl acetate (2×25 mL). The combined organic layers were dried over sodium sulfate, filtered and evaporated under reduced pressure to yield 0.731 g (95%) of the title compound. (MH+) 273.36.

Provenance & Evidence