2,2,2-Trichloroethyl 2-methyl-7-(3-oxo-4-bromobutyramido)-3-cephem-4-carboxylate 、
sodium nitrite hydrate 以
溶剂黄146 、
水 为溶剂,
反应 1.05h,
以to give brown powder of 2,2,2-trichloroethyl 2-methyl-7-(2-hydroxyimino-3-oxo-4-bromobutyramido)-3-cephem-4-carboxylate (的产率得到2,2,2-trichloroethyl (6R)-7-[(4-bromo-2-hydroxyimino-3-oxobutanoyl)amino]-4-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate