Disclosed herein is an industrially feasible process for producing HMG-CoA reductase inhibitor, simvastatin, via an improved acylation process using lovastatin ammonium salt as a starting material. The process comprising treating lovastatin ammonium salt with a base to obtain the compound of formula [III], lactonizing the compound of the formula [III] to obtain compound of formula [IV], selectively protecting the hydroxyl group of the compound of formula [IV] to obtain compound of formula [V], acylating the compound of formula [V] with dimethylbutyrylchloride using potassium halide in presence of a solvent to obtain compound of formula [VI], deprotecting compound of formula [VI] followed by hydrolysis to obtain simvastatin ammonium salt of formula [VII] which is lactonized to obtain simvastatin.
本文披露了一种工业上可行的过程,通过改进的酰化过程利用
洛伐他汀铵盐作为起始物质生产
HMG-CoA还原酶
抑制剂辛伐他汀。该过程包括将
洛伐他汀铵盐与碱处理以获得式[III]的化合物,使式[III]的化合物内酯化以获得式[IV]的化合物,选择性保护式[IV]的羟基以获得式[V]的化合物,使用溶剂中的
氯化二甲基丁酰基
钾酰化式[V]的化合物以获得式[VI]的化合物,去保护式[VI]的化合物,然后
水解以获得式[VII]的
辛伐他汀铵盐,该
铵盐内酯化以获得
辛伐他汀。