(S)-benzyl 4-(3-(tert-butoxycarbonylamino)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate → (S)-tert-butyl 2-oxo-1-(piperidin-4-yl)pyrrolidin-3-ylcarbamate

Participants

Reaction Steps

To a solution of (S)-benzyl 4-(3-(tert-butoxycarbonylamino)-2-oxopyrrolidin-1-yl)piperidine-1-carboxylate (Preparation E, Step C, 7.0 g, 17 mmol) in methanol (300 mL) purged with nitrogen was added Pd/C (10%, 2 g) and the reaction was stirred overnight at ambient temperature under a balloon of hydrogen gas. The reaction was next purged with nitrogen and filtered through Celite®, and the filter cake was washed with methanol (about 100 mL). The combined organic phases were concentrated under vacuum to yield (S)-tert-butyl 2-oxo-1-(piperidin-4-yl)pyrrolidin-3-ylcarbamate (4.0 g, 83%)

Provenance & Evidence