5-cyano-1H-indole-2-carboxylic Acid → 5-Cyano-1H-indole-2-carboxylic acid ((1S)-benzyl-2-oxo-2-thiazolidin-3-yl-ethyl)-amide

Participants

Reaction Steps

(S)-2-Amino-3-phenyl-1-thiazolidin-3-yl-propan-1-one hydrochloride (4.0 mmol) and 5-cyano-1H-indole-2-carboxylic acid (4.0 mmol) were coupled according to Procedure A (0-25° C. reaction temperature, 48 hours reaction time) with the following workup: the reaction mixture was diluted with ethyl acetate and 2 N HCl, the resulting precipitate collected by filtration, washed with 2 N HCl and 2 N NaOH. The crude product was purified by chromatography on silica gel eluted with 30, 40 and 60% ethyl acetate in hexanes. Yield 1.22 g, 75%; HPLC (60/40) 4.74 minutes (97%); PBMS 405 (MH+, 100%);

Provenance & Evidence