7-Amino-3-[1-(2-sulfamoylethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid t-butyl ester 、
Trifluorethylsulfonylessigsaeure 以
四氢呋喃 为溶剂,
反应 12.0h,
以to give 7-(2,2,2-trifluoroethylsulfonylacetamido)-3-[1-(2-sulfamoylethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid t-butyl ester的产率得到7-(2,2,2-Trifluoroethylsulfonylacetamido)-3-[1-(2-sulfamoylethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid t-butyl ester