4-{[(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-carbonyl]-amino}-2-fluoro-benzoic acid methyl ester 、
聚合甲醛 、
三乙酰氧基硼氢化钠 以to afford crude chiral 4-{[(2R,3S,4R,5S)-3-(3-chloro-2-fluoro-phenyl)-4-(4-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-1-methyl-pyrrolidine-2-carbonyl]-amino}-2-fluoro-benzoic acid methyl ester that的产率得到4-{[(2R,3S,4R,5S)-3-(3-chloro-2-fluoro-phenyl)-4-(4-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-1-methyl-pyrrolidine-2-carbonyl]amino}-2-fluoro-benzoic acid methyl ester