(2S,5R,6R)-6-((Z)-2-Methoxycarbonyl-1-methyl-vinylamino)-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid ethoxycarbonylmethyl ester 、
对甲苯磺酸 以
丙酮 为溶剂,
反应 0.17h,
以81%的产率得到(2S,5R,6R)-6-Amino-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid ethoxycarbonylmethyl ester; compound with toluene-4-sulfonic acid