A process for producing a compound having the formula
wherein Pr is hydrogen or a hydroxy protecting group and Pr¹ is a carboxy protecting group, comprising reacting a compound of the formula
wherein Pr is as previously defined, with a compound having the formula Pr¹-OH, wherein Pr¹ is as previously defined and either mineral acid or a silver salt of an organic base, and reacting the product so produced with a compound having the formula:
wherein L is a leaving group.
Three reaction schemes are disclosed as well as novel intermediate compounds.
一种生产式如下化合物的工艺
其中 Pr 为氢或羟基保护基团,Pr¹ 为羧基保护基团的化合物的工艺,包括将式
其中 Pr 如前定义,与具有式 Pr¹-OH 的化合物反应,其中 Pr¹ 如前定义,与矿物酸或有机碱的
银盐反应,并将生成的产物与具有式的化合物反应:
其中 L 为离去基团。
公开了三种反应方案以及新型中间体化合物。