INTERMEDIATE COMPOUND FOR PREPARING ROSUVASTATIN CALCIUM AND METHOD FOR PREPARING ROSUVASTATIN CALCIUM THEREFROM
申请人:Asymchem Laboratories (Tianjin) Co., Ltd.
公开号:US20170022169A1
公开(公告)日:2017-01-26
Provided are an intermediate compound for preparing rosuvastatin calcium and a preparation method of the rosuvastatin calcium. The method comprises: using the foregoing intermediate compound as a raw material, and subjecting the raw material to a step of Wittig reaction, a step of protecting group removal and hydrolysis and a step of calcium salt formation, so as to obtain the rosuvastatin calcium. The product, which is prepared from the intermediate compound, can be substantially enhanced in stereoselectivity and also notably improved in purity and yield; in addition, the method for preparing rosuvastatin calcium from the intermediate compound is simple, convenient and low in cost.
提供了一种制备罗舒伐他汀钙的中间化合物和制备方法。该方法包括:使用上述中间化合物作为原料,经过威特反应步骤、保护基去除和水解步骤以及钙盐形成步骤,从而获得罗舒伐他汀钙。从中间化合物制备的产品在立体选择性上可以大大提高,在纯度和产率方面也明显提高;此外,从中间化合物制备罗舒伐他汀钙的方法简单、方便且成本低廉。