2-<<<(p-methoxybenzyl)oxy>carbonyl>amino>ethyl 1-methyl-1H-tetrazol-5-yl disulfide 、 DL-dithiothreitol 以
四氢呋喃 为溶剂,
以96.7%的产率得到(2-{(2S,3S)-2,3-Dihydroxy-4-[2-(4-methoxy-benzyloxycarbonylamino)-ethyldisulfanyl]-butyldisulfanyl}-ethyl)-carbamic acid 4-methoxy-benzyl ester