1-benzyloxycarbonyl-3-hydroxyazetidine-3-carboxylic acid 、
benzyl (4aS,6R,7R,8R,8aS)-6-[(2R,3S,4R,5S)-5-[(1R,2R,3S,5R,6S)-2-[[(4aR,6R,7R,8aS)-2-phenyl-3-phenylmethoxycarbonyl-7-(phenylmethoxycarbonylamino)-4,4a,6,7,8,8a-hexahydro-2H-pyrano[2,3-e][1,3]oxazin-6-yl]oxy]-5-amino-6-hydroxy-3-(phenylmethoxycarbonylamino)cyclohexyl]oxy-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl]oxy-8-hydroxy-2-phenyl-7-(phenylmethoxycarbonylamino)-4,4a,6,7,8,8a-hexahydro-2H-pyrano[2,3-e][1,3]oxazine-3-carboxylate 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,
反应 3.0h,
生成