HRID1660375

反应详情

EQUATION

反应方程式

HRID 1660375 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

2-Carboxy-7-tert.-butoxycarbonylamino-3-methylene-8-oxo-5-thia-1-aza-bicyclo[4.2.0]octane (21.3 g) is esterified with diphenyldiazomethane (11.2 g) in accordance with the procedure of Example 1. 2-Benzhydryloxycarbonyl-7-tert.-butoxycarbonylamino-3-methylene-8-oxo-5-thia-1-aza-bicyclo[4.2.0]octane (18.35 g) is obtained in the form of white crystals (m.p.=135°-7° C. after recrystallisation from ethyl acetate).