反应详情

2-Benzhydryloxycarbonyl-3-(2-methoxycarbonylaminothiazol-5-yl)-8-oxo-7-(thien-2-yl-acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene (1.82 g) is treated with formic acid (20 cc) in accordance with the working method described in Example 1. 2-Carboxy-3-(2-methoxycarbonylaminothiazol-5-yl)-8-oxo-7-(thien-2-yl-acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene (0.9 g) is obtained in the form of a yellow solid.