benzyl 7β-(2-thien-3-yl-2-diphenylmethoxycarbonyl)acetylamino-7α-methoxy-3-chloroacetoxymethyl-1-carba-1-dethia-3-cephem-4-carboxylate 在
硫脲 作用下,
以
甲醇 、
乙酸乙酯 为溶剂,
以95 mg的产率得到(6R,7R)-7-(2-Benzhydryloxycarbonyl-2-thiophen-3-yl-acetylamino)-3-hydroxymethyl-7-methoxy-8-oxo-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzyl ester