申请人:SPHAERA PHARMA PVT. LTD.
公开号:US20150368223A1
公开(公告)日:2015-12-24
A process for synthesis of enatiomerically pure or enatiomerically enriched or racemic mixture of (+and/or−) epicatechin echm and its intermediates, comprising the steps of: (i) obtaining penta-protected quercetin; (ii) reducing the penta-protected quercetin obtained from step (i); (iii) optionally deprotecting the compound of step (ii); (iv) reducing the compound obtained from step (ii) or step (iii) in the presence of a chiral/achiral reducing agent to obtain a chiral intermediate; (v) deprotecting and/or hydrogenation of the chiral intermediate obtained from step (iv) to obtain (−)-epicatechin; (vi) optionally simultaneously deprotecting and by drogenation of the compound obtained from step (ii) to obtain racemic epicatechin.
一种合成纯对映体或对映体富集或混合物(+和/或−)表儿茶素ECHM及其中间体的方法,包括以下步骤:(i)获得五保护基槲皮素;(ii)还原从步骤(i)获得的五保护基槲皮素;(iii)可选地去保护步骤(ii)中的化合物;(iv)在手性/非手性还原剂的存在下还原从步骤(ii)或步骤(iii)获得的化合物以获得手性中间体;(v)去保护和/或氢化从步骤(iv)获得的手性中间体以获得(−)-表儿茶素;(vi)可选地同时去保护和氢化从步骤(ii)获得的化合物以获得外消旋表儿茶素。