[EN] PROCESS FOR PREPARING SIMVASTATIN.<br/>[FR] PROCEDE DE PREPARATION DE SIMVASTATINE
申请人:UK CHEMIPHARM CO LTD
公开号:WO2005058861A1
公开(公告)日:2005-06-30
The present invention relates to a process for preparing simvastatin, comprising the steps of reacting a diol lactone of formula 4 with a di-substituted silyl dichloride (dichlorosilane) to produce a diol lactone dimer of formula 5, subsequently acylating the diol lactone dimer with 2,2-dimethylbutyryl chloride to produce a simvastatin dimer of formula 6, and deprotecting the simvastatin dimer to produce simvastatin. The process is simple in overall manufacturing steps, uses cheap protecting agent, and has an excellent productivity and economical effect.