(2S,4R)-2-aminomethyl-4-tritylsulfanyl-pyrrolidine-1-carboxylic acid benzyl ester 、
2,5-二氟苯甲醛 、 以gave (2S,4R)-2-[(2,5-difluoro-benzylamino)-methyl]-4-mercapto-pyrrolidine-1-carboxylic acid benzyl ester as colorless oil, MS的产率得到(2S,4R)-2-[(2,5-difluoro-benzylamino)-methyl]-4-mercapto-pyrrolidine-1-carboxylic acid benzyl ester