(3aS,4S,4aS,7R,9R,9aS)-methyl [(9-amino-4-benzyloxy-2,2-dimethyl-8-oxo-octahydro-1,3-dioxa-5-thia-7a-azacyclopenta[f]azulene-7-carbonyl)amino]acetate 、 (3aS,4S,4aS,7R,9R,9aS)-lithium [(9-azido-4-benzyloxy-2,2-dimethyl-8-oxo-octahydro-1,3-dioxa-5-thia-7a-azacyclopenta[f]azulene-7-carbonyl)amino]acetate 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以54%的产率得到methyl 2-[[(1S,2S,3S,7R,8R,11R)-8-[[2-[[(1S,2S,3S,7R,8R,11R)-8-azido-5,5-dimethyl-9-oxo-2-phenylmethoxy-4,6-dioxa-13-thia-10-azatricyclo[8.3.0.03,7]tridecane-11-carbonyl]amino]acetyl]amino]-5,5-dimethyl-9-oxo-2-phenylmethoxy-4,6-dioxa-13-thia-10-azatricyclo[8.3.0.03,7]tridecane-11-carbonyl]amino]acetate