2(R)-[(4-aminomethyl-phenylamino)-(4-methoxy-phenyl)-(S)-methyl]-5(S)-(tert-butyl-dimethyl-silyloxy)-5-(4-fluoro-phenyl)-pentanoic acid methyl ester 、
4-甲氧基苯甲醛 以
甲苯 为溶剂,
以96%的产率得到5(S)-(tert-butyl-dimethyl-silyloxy)-5-(4-fluoro-phenyl)-2(R)-[(4-{[(4-methoxy-benzylidene)-amino]-methyl}-phenylamino)-(4-methoxy-phenyl)-(S)-methyl]-pentanoic acid methyl ester