Diphenylphosphinic chloride → HCID 53357875, compound

Participants

Reaction Steps

A solution of chiral (2R,3S,4R,5S)-3-(3-chloro-2-fluoro-phenyl)-4-(4-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid (60.9 mg, 0.130 mmol) in dichloromethane (3 ml) were added DIPEA (66.8 mg, 0.514 mmol) and DIPHENYLPHOSPHINIC CHLORIDE (78.2 mg, 0.324 mmol). The mixture was stirred for 20 mins under argon before methyl 4-(4-aminophenyl)butanoate (24.7 mg, 0.128 mmol) was added. After 2 hrs, the reaction mixture was diluted with dichloromethane and extracted with water then with sat. NaHCO3, water, and sat. NaCl. After drying over Na2SO4 the crude material was purified by silica gel chromatography with ethyl acetate and n-hexanes giving chiral methyl 4-(4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)phenyl)butanoate (79.2 mg., 96%) as a white solid. MS (ES+) m/z Calcd: [(M+H)+]: 642.2. found: 642.1.

Provenance & Evidence