tert-butyl 7β-<2-(2-tritylaminothiazol-4-yl)-(Z)-2-methoxyiminoacetamido>-3-<(tert-butoxycarbonylmethyl)thio>-4-hydroxy-1-dethia-2-thiacepham-4-carboxylate 在
四碘化二磷 作用下,
以
吡啶 为溶剂,
以47.2%的产率得到1,1-dimethylethyl 7-[2-(2-tritylaminothiazol-4-yl)-2-methoxyimino-acetamido]-3 [[2-(1,1-dimethylethoxy)-2-oxoethyl]-thio]-8-oxo-4-thia-1-azabicyclo[4,2,0]oct-2-ene-2-carboxylate