Triethylamine → Benzyl 3-[methoxy(methyl)carbamoyl]piperidine-1-carboxylate

Participants

Reaction Steps

1-[(Benzyloxy)carbonyl]piperidine-3-carboxylic acid (5.86 g, 22.3 mmol) and N,O-dimethylhydroxylamine hydrochloride (3.55 g, 36.4 mmol) in tetrahydrofuran (60 mL) was stirred with triethylamine (5.50 mL, 39.5 mmol), 1-hydroxybenzotriazole (1.17 g, 8.66 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (7.18 g, 37.4 mmol) at room temperature for one day. After addition of water, the reaction solution was extracted with ethyl acetate, and the organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=1/1 (v/v)) to give the title compound as a colorless oil (5.95 g, yield 87%).

Provenance & Evidence