PROCESS FOR ISOLATION OF A MIXTURE OF RRRS AND SSSR CONFIGURATIONS OF NEBIVOLOL INTERMEDIATES
申请人:Shanghai Modern Pharmaceutical Co., Ltd.
公开号:EP2236510A1
公开(公告)日:2010-10-06
The invention discloses a process for isolation of a mixture of RRRS and SSSR configurations of nebivolol intermediates represented by formulae II and III respectively, which is optionally selected from one of the following two manners: (1) precipitation solvent is added to alcohol solvent comprising the mixture of RRRS, SSSR, RRSR and SSRS configurations of nebivolol intermediates represented by formula I, heating, cooling to precipitate crystals and filtrating; (2) the mixture of RRRS, SSSR, RRSR and SSRS configurations of nebivolol intermediates represented by formula I is added into the mixture solvent of alcohol solvent and precipitation solvent, heating, cooling to precipitate crystals and filtrating. In formulae I, II and III, X is H, C1-C6 alkyl or C1-C6 alkoxy, n is 1-5.
本发明公开了一种分别以式Ⅱ和式Ⅲ为代表的奈必洛尔中间体的RRRS和SSSR构型混合物的分离工艺,该工艺可任选以下两种方式之一:(1)将沉淀溶剂加入到包含式 I 所代表的 RRRS、SSSR、RRSR 和 SSRS 构型的奈必洛尔中间体混合物的醇溶剂中,加热,冷却析出晶体并过滤;(2)将式 I 所代表的 RRRS、SSSR、RRSR 和 SSRS 构型的奈必洛尔中间体混合物加入到醇溶剂和沉淀溶剂的混合溶剂中,加热,冷却析出晶体并过滤。在式 I、II 和 III 中,X 为 H、C1-C6 烷基或 C1-C6 烷氧基,n 为 1-5。