Ethyl 4-piperidinecarboxylate → HCID 59845591, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of the crude trifluoromethanesulfonic acid 1-(4-chloro-2,6-dimethylphenyl)-3,6-dimethyl-1H-pyrrolo[2,3-b]pyridin-4-yl ester (20.5 g), ethyl isonipecotate (74.4 g) and N,N-diisopropylethylamine (12.2 g) was heated at 150-170° C. for 1 hour. To the reaction mixture, water was added and extracted with ethyl acetate. The organic layer was washed with water, and brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated under reduced pressure and the residue was purified by a silica gel column chromatography (silica gel: Wako Gel (C200), eluent: hexane/ethyl acetate=5:1) to give 1-[1-(4-chloro-2,6-dimethylphenyl)-3,6-dimethyl-1H-pyrrolo[2,3-b]pyridin-4-yl]piperidine-4-carboxylic acid ethyl ester (16.6 g) as a pale yellow solid.

Provenance & Evidence