A method for the synthesis of dienogest from 3-methoxy-estra-1,3,5-trien-17-one includes 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.
合成地诺酮的方法包括以下步骤:a)在有机溶剂中,将3-甲氧基
雌甾-1,3,5-
三烯-17-酮与醇在酸的存在下反应,形成3-甲氧基-17,17-二烷氧基-
雌甾-1,3,5-
三烯;b)将步骤a)的产物部分还原,通过在液
氨中与碱
金属反应;c)用温和的酸处理步骤b)的产物;d)将步骤c)的产物与
氰甲基锂反应;e)用
草酸处理步骤d)的产物;f)将步骤e)的产物与
吡啶三
溴化物在
吡啶中反应,得到地诺酮。