(Z)-2-(2-amino-thiazol-4-yl)-2-trityloxyimino-acetic acid-benzotriazol-1-yl ester 、 (E)-(6R,7R)-7-amino-3-[1-(4-hydroxy-phenyl)-2-oxo-pyrrolidin-3-ylidenemethyl]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid trifluoroacetate 以
乙酸乙酯 为溶剂,
以1.12 g (70%)的产率得到(6R,7R)-7-[(Z)-2-(2-Amino-thiazol-4-yl)-2-trityloxyimino-acetylamino]-3-[(E)-1-(4-hydroxy-phenyl)-2-oxo-pyrrolidin-3-ylidenemethyl]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid