Triethylamine → Benzyl 4-oxopiperidine-1-carboxylate

Participants

Reaction Steps

To a stirred solution of piperidin-4-one hydrochloride (1567 g, 11.56 mol) and triethylamine (1400 g, 13.87 mol) in dichloromethane (12 L) was added benzyl chloroformate (1965 g, 11.55 mol) dropwise at 0° C. After the addition, the reaction mixture was allowed to warm to room temperature and stirred overnight. TLC (EtOAc/petroleum ether=1:5) showed the reaction was complete. The mixture was washed with water (3 L) and brine (1 L), dried over sodium sulfate and concentrated to afford benzyl 4-oxopiperidine-1-carboxylate as a colorless oil.

Provenance & Evidence