申请人:Zhejiang Hisun Pharmaceutical Co., Ltd.
公开号:US20190023681A1
公开(公告)日:2019-01-24
A method and an intermediate for preparing a tulathromycin. The method includes the following step: in an organic solvent, subjecting a compound represented by formula (II) and an n-propylamine to a ring-opening addition shown below to obtain a tulathromycin represented by formula (I), wherein the organic solvent is a 1,2-propandiol. Tulathromycin obtained using the method has a high purity, with an HPLC purity being 95% and above, and up to 99% and above, satisfying a required purity for preparing a tulathromycin as a pharmaceutical formulation. The method has a high yield, is simple to operate, and is more suitable for industrial production.
一种制备替拉噻啉的方法及其中间体。该方法包括以下步骤:在有机溶剂中,使式(II)表示的化合物与正丙胺经历如下所示的环开加成反应,以获得式(I)表示的替拉噻啉,其中有机溶剂为1,2-丙二醇。使用该方法获得的替拉噻啉具有高纯度,其高效液相色谱纯度为95%及以上,甚至可达99%及以上,满足制备作为药物制剂的替拉噻啉所需纯度。该方法收率高,操作简便,更适合工业生产。