申请人:Takehara Jun
公开号:US20110009615A1
公开(公告)日:2011-01-13
An object of the present invention is to provide a novel method for producing a steroid compound. The present invention provides a method for producing 3,7-dioxo-5β-cholanic acid or ester derivatives thereof, which uses, as raw materials, sterols having double bonds at positions 5 and 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, and which comprises the following 4 steps: (I) a step of performing oxidation of a hydroxyl group at position 3 and isomerization of a double bond at position 5 to position 4; (II) a step of converting position 24 to a carboxyl group or an ester derivative thereof by the oxidative cleavage of a side chain; (III) a step of introducing an oxygen functional group into position 7; and (IV) a step of constructing a 5β-configuration by reduction of a double bond at position 4.
本发明的目的是提供一种新型的合成类固醇化合物的方法。本发明提供了一种生产3,7-二氧代-5β-胆酸或其酯衍生物的方法,该方法使用具有5号和24号位置上双键的类固醇作为原料,例如胆甾-5,7,24-三烯-3β-醇、麦角甾-5,7,24(28)-三烯-3β-醇、脱甾固醇、褐藻甾醇或麦角甾-5,24(28)-二烯-3β-醇,并包括以下4个步骤:(I)在3号位置进行羟基氧化和5号位置双键异构化至4号位置;(II)通过侧链的氧化裂解将24号位置转化为羧基或其酯衍生物;(III)在7号位置引入氧功能基;以及(IV)通过还原4号位置的双键来构建5β-构型。