申请人:——
公开号:US20030180392A1
公开(公告)日:2003-09-25
The present invention relates to an improved process for the production of vasicine of formula (1) from the
Adhatoda vasica,
said process comprising the steps of:
1
extracting the dried and pulverized leaves with an alcoholic extract at an ambient temperature, concentrating the alcoholic extract to obtain a concentrated extract, treating and stirring extract with an aqueous organic acid for 2-24 hours, extracting the acid solution of with an organic solvent, separating the organic layer and aqueous acidic layer, basifying the aqueous acidic solution with a base, extracting the basified solution with an organic solvent, separating the organic layer, drying and filtering, evaporating the organic layer to obtain an amorphous residue, and treating the amorphous residue with an organic solvent or mixture of organic solvents to obtain vasicine.
本发明涉及一种从印度橙叶提取vasicine(化学式(1))的改进生产工艺,该工艺包括以下步骤:1.使用酒精提取剂在室温下提取干燥和粉碎的叶子,浓缩酒精提取物以获得浓缩提取物;2.将提取物与水溶性有机酸处理和搅拌2-24小时,用有机溶剂提取酸性溶液,分离有机层和水酸性层;3.用碱性物质将水酸性溶液碱化,用有机溶剂提取碱化溶液,分离有机层,干燥和过滤;4.蒸发有机层以获得无定形残留物,用有机溶剂或有机溶剂混合物处理无定形残留物以获得vasicine。