申请人:Mitsubishi Chemical Corporation
公开号:EP1985621A1
公开(公告)日:2008-10-29
It is an object of the present invention to provide a novel method for producing a steroid compound. The present invention provides a method for producing 5β-3,7-dioxocholanic acid or an ester derivative thereof, using, as a raw material, a sterol having double bonds at position 5 and at position 24, such as cholesta-5,7,24-trien-3β-ol, ergosta-5,7,24(28)-trien-3β-ol, desmosterol, fucosterol, or ergosta-5,24(28)-dien-3β-ol, via the following 4 steps:
(I) a step involving oxidation of a hydroxyl group at position 3 and isomerization of a double bond at position 5 to position 4;
(II) a step involving the oxidative cleavage of a side chain to convert position 24 to a carboxyl group or an ester derivative thereof;
(III) a step of introducing an oxygen functional group into position 7; and
(IV) a step of constructing a 5β configuration by reductive saturation of a double bond at position 4.
本发明的目的是提供一种生产类固醇化合物的新方法。本发明提供了一种生产 5β-3,7-二氧代胆烷酸或其酯类衍生物的方法,该方法以位置 5 和位置 24 具有双键的甾醇为原料,例如胆甾-5,7,24-三烯-3β-醇、麦角甾-5,7,24(28)-三烯-3β-醇、去甲胆甾醇、褐藻甾醇或麦角甾-5,24(28)-二烯-3β-醇,通过以下 4 个步骤进行生产:
(I) 氧化位置 3 的羟基,并将位置 5 的双键异构化为位置 4;
(II) 氧化裂解侧链,将位置 24 转化为羧基或其酯衍生物的步骤
(III) 将氧官能团引入位置 7 的步骤;以及
(IV) 通过还原饱和位置 4 的双键来构建 5β 构型的步骤。