申请人:Tian Weisheng
公开号:US20060166955A1
公开(公告)日:2006-07-27
The present invention relates to a clean process for the degradation of steroidal sapogenin to produce 16-dehydropregnenolone and its analogs. The pure or the crude pseudo steroidal sapogenin, derived from steroidal sapogenin, dissolved in organic solvent, reacts with hydrogen peroxide with or without metal compound and acid as catalyst, and the crude products directly go through elimination and hydrolization in the presence of base to give 16-Dehydropregnenolone or its analog, accompanied with the other product 4R(or S)-methyl-5-hydroxy-pentate, which is converted to 4R(or S)-methyl-δ-pentyl lactone after acidification and extraction from the water layer. This technology improved the utilizing degree of steroidal sapogenin, improved the yield, and cleared up the chromium pollution in the former technique. In a word, the method disclosed in this invention is more suitable for manufacture.
本发明涉及一种用于降解类固醇皂甙生成16-去氢孕酮和其类似物的清洁工艺。从类固醇皂甙中提取的纯或粗假类固醇皂甙,溶解在有机溶剂中,与过氧化氢反应,可以加入金属化合物和酸作为催化剂,粗产品直接在碱的存在下经过消除和水解,得到16-去氢孕酮或其类似物,伴随另一产品4R(或S)-甲基-5-羟基-戊酸酯,经过酸化和从水层中提取后转化为4R(或S)-甲基-δ-戊内酯。这种技术提高了类固醇皂甙的利用率,提高了产量,并清除了以前技术中的铬污染。总之,本发明揭示的方法更适合生产。