Potassium Carbonate → Tert-butyl 4-(morpholine-4-carbonyl)piperazine-1-carboxylate

Participants

Reaction Steps

Amine preparation: A mixture of 4-morpholinocarbonyl chloride (0.38 ml), 1-BOC-piperazine (552 mg) and potassium carbonate (439 mg) in acetonitrile (7 mL) was stirred at room temperature for 3 hours. The reaction mixture was then diluted with dichloromethane, washed with brine, dried (MgSO4) and the solvent removed in vacuo to yield 4-(morpholine-4-carbonyl)-piperazine-1-carboxylic acid tert-butyl ester (865 mg). Treatment of this compound with HCl in dichloromethane/methanol yielded the title compound, which was isolated as the hydrochloride salt.

Provenance & Evidence