23138-53-6 → rac-4-{[(2S,3S,4S)-2,3-bis-(4-chloro-2-fluoro-phenyl)-3-cyano-4-(2,2-dimethyl-propyl)-pyrrolidine-1-carbonyl]-amino}-benzoic acid methyl ester

Participants

Reaction Steps

A mixture of rac-(2S,3S,4S)-2,3-bis(4-chloro-2-fluoro-phenyl)-4-(2,2-dimethyl-propyl)-pyrrolidine-3-carbonitrile (150.0 mg, 0.35 mmol) and 4-isocyanato-benzoic acid methyl ester (Aldrich, 86.0 mg, 0.53 mmol) in CH2Cl2 (5 mL) was stirred at rt for 3 h. The reaction mixture was then concentrated and purified by flash column to give rac-4-{[(2S,3S,4S)-2,3-bis-(4-chloro-2-fluoro-phenyl)-3-cyano-4-(2,2-dimethyl-propyl)-pyrrolidine-1-carbonyl]amino}-benzoic acid methyl ester (141.6 mg, 66.6%) which was used in the next step without further purification.

Provenance & Evidence