Method for synthesis of dienogest from estrone-3-methylether
申请人:HEYL Chemisch-Pharmazeutische Fabrik GmbH und
Co. KG
公开号:EP2256128A1
公开(公告)日:2010-12-01
The invention concerns a method for the synthesis of dienogest from 3-methoxy-estra-1,3,5-trien-17-one is comprising the steps of a) reacting 3-methoxy-estra-1,3,5-trien-17-one with alcohol in the presence of an acid in an organic solvent to form 3-methoxy-17,17-dialkoxy-estra-1,3,5-triene; b) subjecting the product of step a) to partial reduction by reaction with alkali metal in liquid ammonia; c) treating the product of step b) with mild acid; d) reacting the product of step c) with cyanomethyl lithium; e) treating the product of step d) with oxalic acid and f) treating the product of step e) with pyridinium tribromide in pyridine to yield dienogest.
本发明涉及一种由 3-甲氧基-雌甾-1,3,5-三烯-17-酮合成双烯雌酚的方法,包括以下步骤 a) 在有机溶剂中,在酸存在下,使 3-甲氧基-雌甾-1,3,5-三烯-17-酮与醇反应,生成 3-甲氧基-17,17-二烷氧基-雌甾-1,3,5-三烯;b) 在液氨中与碱金属反应,使步骤 a) 的产物部分还原; c) 用弱酸处理步骤 b) 的产物; d) 使步骤 c) 的产物与氰甲基锂反应; e) 用草酸处理步骤 d) 的产物, f) 用吡啶中的三溴化吡啶处理步骤 e) 的产物,生成二烯孕酮。