反应详情

To a suspension of 1-methyl-piperidine-4-carboxylic acid hydrochloride (11.36 mmol, 2.04 g) and N,N-dimethylformamide (0.129 mmol, 0.01 ml, 9.40 mg) in dichloromethane (10 ml) at 0° C. was added oxalyl chloride (14.76 mmol, 1.40 ml) drop wise. The cooling bath was removed and the reaction mixture stirred at room temperature for 20 hours. Then the reaction mixture was concentrated in vacuo to give 1-methylpiperidine-4-carbonyl chloride hydrochloride (2.5 g).

1. customThe cooling bath was removed
2. concentrationThen the reaction mixture was concentrated in vacuo