Ethyl chloroformate → 4-Indol-1-yl-piperidine-1-carboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 1-N-(1-benzyl-piperidin-4-yl)-indole (100 g, 0.344 mol) in methylene chloride (1 L) was added ethyl chloroformate (99.2 mL) dropwise with stirring. The mixture was refluxed for 48 hours, cooled to room temperature, and concentrated. The residue was crystallized from i-propanol to give the title compound as colorless crystals (50 g, 53% yield). M. Pt.: 127° C.

Provenance & Evidence