Nipecotic Acid → 1-((Benzyloxy)carbonyl)piperidine-3-carboxylic acid

Participants

Reaction Steps

Nipecotic acid (3.93 g, 30.4 mmol) and sodium carbonate (5.10 g, 48.1 mmol) in water (40 mL) was mixed with benzyl chloroformate (5.20 mL, 36.4 mmol) under cooling with ice and stirred at room temperature for one day. After addition of water and 1 M aqueous sodium hydroxide, the reaction mixture was allowed to separate by adding diethyl ether. The aqueous layer was adjusted to pH 1 with concentrated hydrochloric acid and extracted with ethyl acetate. The resulting organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give the title compound as a pale yellow oil (5.86 g, yield 73%).

Provenance & Evidence