An Efficient Procedure for the Synthesis of 21-Acetoxypregna-1,4,9(11),16- tetraene-3,20-dione
作者:Luu D. Huy、Nguyen T. Diep、Tran K. Vu、Tatiana S. Savinova、Marina V. Donova
DOI:10.2174/1386207323666200219122644
日期:2020.5.19
introduction of Δ1(2)-double bond. Other stages of the synthesis were epimerization, Stork's iodination procedure and dehydration. RESULT 21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-dione was prepared from 9α- hydroxyandrostenedione in yield more than 46%. CONCLUSION An efficient and practically feasible procedure for the synthesis of 21-acetoxypregna- 1,4,9(11),16-tetraene-3,20-dione from 9α-hydroxyandrostenedione
背景技术卤代皮质类固醇广泛用于医学中,并且估计这些类固醇API的全球需求每年为40-70吨。越南目前进口的药用化合物高达90%,尤其是甾体药物的100%。当前,工业生产基于由16-脱氢孕烯醇酮乙酸酯(从薯os皂素获得)或雄烯二酮(从植物甾醇获得)的皮质类固醇的化学合成。开发更短的合成方案和更经济可行的技术具有重要意义。在皮质类固醇合成的最后阶段引入1(2)-双键会导致收率低下。21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-二酮(乙酸四烯酯)是合成高活性卤代皮质类固醇(如地塞米松和其他卤代皮质类固醇)的关键中间体。21-acetoxypregna-1,4,9(11),16-tetraene-3,20-dione是从容易获得且便宜的9α-羟基androst-4-ene-3,17-dione合成地塞米松的关键中间体。目的本研究的目的是开发一种有效且较短的