[EN] IMPROVED OMEPRAZOLE PROCESS AND COMPOSITIONS THEREOF<br/>[FR] PROCEDE D'OMEPRAZOLE AMELIORE ET COMPOSITIONS CORRESPONDANTES
申请人:MERCK & CO INC
公开号:WO2001044231A1
公开(公告)日:2001-06-21
The present invention describes an improved process for the preparation, isolation, and purification of the anti-ulcer agent omeprazole whereby the sulfide precursor pyrmetazole is reacted subsurfacely with exactly one molar equivalent of meta-chloroperoxybenzoic acid in a chlorinated aliphatic hydrocarbon or aromatic hydrocarbon solvent, such as methylene chloride or toluene; residual organic solvent is removed from the aqueous layer by vacuum distillation; crude product is obtained by reactive crystallization with an alkyl formate or formic acid solution and seeding; and pure product is isolated by recrystallization in methanol-water containing aqueous NaOH by subsurface addition of aqueous acetic acid to pH 9.0, seeding, filtration, washing, and drying. Omeprazole and compositions of omeprazole containing no chromatographically detectable levels of residual non-alcoholic organic reaction solvent and diminished levels of alcoholic solvent are also described.
本发明描述了一种改进的制备,分离和纯化抗溃疡药物奥美拉唑的过程。其中,磺化前体吡尔酮唑在氯化脂肪烃或芳香族烃溶剂(如氯甲烷或甲苯)中与恰好一个摩尔当量的间氯过氧苯甲酸进行亚表面反应。通过真空蒸馏从水层中去除残留有机溶剂,通过与烷基甲酸酯或甲酸溶液反应结晶并加入种子晶体获得粗品。通过亚表面加入乙酸水溶液调节pH至9.0,加入种子晶体,过滤,洗涤和干燥,通过在甲醇-水中含有NaOH的溶液中再结晶得到纯品。本发明还描述了奥美拉唑及其组合物,其中不含有色谱检测到的残留非醇类有机反应溶剂,并且醇类溶剂的含量降低。