Methods of producing carboxylic acid ester derivatives of formulae (I) and (II), which are useful, for instance, as intermediates for producing an anti-hypercholesterolemic agent having an inhibitory effect on HMG-CoA Reductase:
wherein R1 and R2 are independently a protective group for hydroxyl group, or R1 and R2 integrally constitute a protective group for hydroxyl groups; R3 is an alkyl group, or an aryl group; and R4 is a substituted aryl group, a substituted heterocyclic group, a substituted vinyl group, or a substituted cycloalkenyl group; and
wherein R1, R2, R3 and R4 are respectively the same as defined in the above formula (I), are disclosed. In addition, intermediates for use in these methods of producing the carboxylic acid ester derivatives are disclosed.
生产式(I)和(II)的
羧酸酯衍
生物的方法,这些衍
生物可用作生产对
HMG-CoA 还原酶有抑制作用的抗
胆固醇药物的中间体:
其中 R1 和 R2 独立为羟基保护基团,或 R1 和 R2 整体构成羟基保护基团;R3 为烷基或芳基;R4 为取代的芳基、取代的杂环基、取代的
乙烯基或取代的环烯基;以及
其中 R1、R2、R3 和 R4 分别与上式(I)中定义的相同。此外,还公开了用于这些
羧酸酯衍
生物生产方法的中间体。