Hydrochloric Acid → 1-(2-Chloropyridin-4-yl)piperidin-4-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 8-(2-chloropyridin-4-yl)-1,4-dioxa-8-azaspiro[4.5]decane (1.26 g, 4.95 mmol) in acetone (11 mL) was added HCl (2 N, 39.6 mL, 79.1 mmol) and the resulting mixture stirred at 50° C. for 2 hours, then cooled to room temperature. The pH was set to ˜8 by adding solid sodium hydrogen carbonate and then extracted with dichloromethane. The combined organic layers were washed with brine, dried over sodium sulfate, filtered and evaporated to give the title product (1.03 g, 99%) as a white solid.

Provenance & Evidence