(R)-2-(4-{[(2R,3S,4R,5S)-4-(4-chloro-2-fluorophenyl)-3-(3-chloro-2-fluorophenyl)-4-cyano-5-(2,2-dimethylpropyl)pyrrolidine-2-carbonyl]amino}-3-methoxybenzoylamino)pentanedioic acid dimethyl ester hydrochloride 、
氢氧化锂 在
crude residue 、
acetonitrile-water 、
乙腈 作用下,
以
tetrahydrofuran-water 为溶剂,
反应 4.0h,
以to give (R)-2-(4-{[(2R,3S,4R,5S)-4-(4-chloro-2-fluoro-phenyl)-3-(3-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carbonyl]-amino}-3-methoxy-benzoylamino)-pentanedioic acid, hydrochloride after lyophilization with acetonitrile and 1N solution of hydrochloric acid的产率得到(R)-2-(4-{[(2R,3S,4R,5S)-4-(4-chloro-2-fluorophenyl)-3-(3-chloro-2-fluorophenyl)-4-cyano-5-(2,2-dimethylpropyl)pyrrolidine-2-carbonyl]amino}-3-methoxybenzoylamino)pentanedioic acid hydrochloride