申请人:Lek Pharmaceuticals d. d.
公开号:US08207333B2
公开(公告)日:2012-06-26
A new process for preparing pure amorphous rosuvastatin calcium, substantially free of impurities, is disclosed. A process comprising hydrolysing a C1 to C5 alkyl ester of rosuvastatin, preferably methyl rosuvastatin or tert-butyl rosuvastatin, with a base, e.g. sodium hydroxide, in the presence of an aprotic solvent, preferably tetrahydrofuran and N,N-dimethyl acetamide, or in the presence of a mixture of an aprotic solvent and water, to obtain a solution of rosuvastatin salt, which may be converted to another rosuvastatin salt using another cation, e.g. with calcium cation to obtain rosuvastatin calcium. Rosuvastatin amine salts may be obtained as well.
In another preferred aspect of the invention rosuvastatin free acid may be converted to various rosuvastatin salts, e.g. to rosuvastatin calcium, rosuvastatin sodium or various rosuvastatin amine salts, including rosuvastatin solvates, e.g. rosuvastatin calcium hydrate.
Rosuvastatin calcium is useful in the treatment of hyperlipidemia, hypercholesterolemia and atherosclerosis.
本发明公开了一种制备纯无定形罗舒伐他汀钙的新工艺,基本上无杂质。该工艺包括在无极性溶剂(如四氢呋喃和N,N-二甲基乙酰胺)或无极性溶剂和水的混合物中,在碱(如氢氧化钠)的存在下水解罗舒伐他汀的C1到C5烷基酯,优选甲基罗舒伐他汀或叔丁基罗舒伐他汀。这样可以获得罗舒伐他汀盐的溶液,可以使用另一种阳离子(如钙阳离子)将其转化为另一种罗舒伐他汀盐,例如罗舒伐他汀钙。还可以获得罗舒伐他汀胺盐。在发明的另一个优选方面,罗舒伐他汀游离酸可以转化为各种罗舒伐他汀盐,例如罗舒伐他汀钙、罗舒伐他汀钠或各种罗舒伐他汀胺盐,包括罗舒伐他汀溶剂合物,例如罗舒伐他汀钙水合物。罗舒伐他汀钙在治疗高脂血症、高胆固醇血症和动脉粥样硬化方面非常有用。