Water → ethyl 3-amino-5-{(3R)-3-[(tert-butoxycarbonyl)amino]piperidin-1-yl}-1-(2-chlorobenzyl)-4-cyano-1H-pyrrole-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

A solution of N-(1-{(3R)-3-[(tertbutoxycarbonyl)amino]piperidin-1-yl}-2,2-dicyanovinyl)-N-(2-chlorobenzyl)glycine ethyl ester (320 mg) in tetrahydrofuran (5 ml) was cooled to 0° C., followed by adding thereto sodium hydride (33 mg), and the resulting mixture was stirred for 1 hour while being warmed to 25° C. Water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution, dried over sodium sulfate and then filtered and the filtrate was concentrated under reduced pressure. The resulting residue was purified by a silica gel column chromatography (hexane/ethyl acetate=3/1 to 1/1) to obtain the title compound (300 mg).

Provenance & Evidence