(4-nitrophenyl)methyl 2-[(2S,4R)-4-[tert-butyl(dimethyl)silyl]oxy-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidin-2-yl]thiomorpholine-4-carboxylate 、
氯甲酸对硝基苄酯 、
potassium thioacetate 以84%的产率得到(4-nitrophenyl)methyl 2-[(2S,4S)-4-acetylsulfanyl-1-[(4-nitrophenyl)methoxycarbonyl]pyrrolidin-2-yl]thiomorpholine-4-carboxylate