Diphenylmethyl (6R,7R)-3-<4(RS)-3,3-Bis(ethoxycarbonyl)-1-pyrazolin-4-yl>-7-phenylacetamidoceph-3-em-4-carboxylate 以
乙酸乙酯 为溶剂,
反应 48.0h,
以87%的产率得到Diphenylmethyl (6R,7R)-3-<(1RS)-2,2-Bis(ethoxycarbonyl)cyclopropyl>-7-phenylacetamidoceph-3-em-4-carboxylate