Present invention discloses a novel, commercially viable process for extraction of Alpha yohimbine from the bark, stem and leaves of Rauwolfia species. The extract is obtained by a precipitation method involving alternate steps of acidification and alkalization along with use of specific organic solvents. The extract gives higher yield of 7-8 fold as compared to other processes and without use of any column chromatography at all. Yield of alpha yohimbine from roots and leaves of Rauwolfia canescens by process of present invention was 0.017% and 0.4% respectively, indicating that leaves are a much better source. The HPLC analysis of the compound obtained indicated a purity of >90%.
本发明公开了一种新颖的、商业上可行的工艺,用于从 Rauwolfia 树种的树皮、茎和叶中提取 Alpha Yohimbine。这种
提取物是通过沉淀法提取的,其中包括酸化和碱化交替步骤以及使用特定的有机溶剂。与其他工艺相比,这种
提取物的产量要高出 7-8 倍,而且完全不需要使用任何柱层析法。用本发明的工艺从 Rauwolfia canescens 的根和叶中提取的甲型
育亨宾的产量分别为 0.017% 和 0.4%,这表明叶是更好的来源。对获得的化合物进行的 HPLC 分析表明,其纯度大于 90%。