乙酸烯丙酯 、
Dithiocarbonic acid S-[(3S,4R)-1-benzyl-4-(4-fluoro-benzyl)-2,5-dioxo-pyrrolidin-3-yl] ester O-methyl ester 在
O-ethyl S-benzoyl xanthate 作用下,
以67%的产率得到Acetic acid 3-[(3S,4S)-1-benzyl-4-(4-fluoro-benzyl)-2,5-dioxo-pyrrolidin-3-yl]-2-methoxythiocarbonylsulfanyl-propyl ester