HRID364574

反应详情

EQUATION

反应方程式

HRID 364574 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

A solution of 2-(2-formamidothiazol-4-yl)-2-butoxyiminoacetic acid (syn isomer, 1.5 g.), N,N-dimethylformamide (440 mg.) and phosphoryl chloride (920 mg.) in ethyl acetate (12 ml.) and a solution of 4-nitrobenzyl 7-amino-3-chloro-3-cephem-4-carboxylate (2.03 g.), trimethylsilylacetamide (7 g.) and bis(trimethylsilyl)acetamide (2 ml.) in ethyl acetate (25 ml.) were treated in a similar manner to that of Example 21-(1) to give 4-nitrobenzyl 7-[2-(2-formamidothiazol-4-yl)-2-butoxyiminoacetamido]-3-chloro-3-cephem-4-carboxylate (syn isomer, 2.8 g.), yellow powder.