A process for the preparation of HMG-CoA reductase inhibitors and intermediate compounds employed therein
申请人:MERCK FROSST CANADA INC.
公开号:EP0183132A2
公开(公告)日:1986-06-04
Disclosed is a process for the preparation of a compound of the general formula
wherein R' is, e.g.,
wherein Q is
or
is H or OH; and R is hydrogen or methyl, and a and c or b and d represent double bonds or all of a, b, c, and d are single bonds comprising:
(A) reacting a compound of the formula
wherein R6 and R7 are, e.g., C1-5 alkyl, with a compound of the formula:
wherein X, e.g., is a metal atom to afford a compound of the formula
(B) lactonizing the compound of the formula (IV) under standard acidic conditions to afford the compound of formula
and (C) removing the R7 group with an organoborane halide.
本发明公开了一种通式如下的化合物的制备方法
其中 R'例如为
其中 Q 是
或
是 H 或 OH;R 是氢或甲基,a 和 c 或 b 和 d 代表双键或 a、b、c 和 d 全为单键,包括
(A) 使以下式子的化合物反应
其中 R6 和 R7 为 C1-5 烷基等)与式化合物反应:
其中 X(例如)为金属原子的式化合物反应,得到式化合物
(B) 在标准酸性条件下,将式(IV)化合物内酯化,得到式(IV)化合物
(C) 用有机硼烷卤化物除去 R7 基团。