申请人:KABUSHIKI KAISHA YAKULT HONSHA
公开号:EP0088642A2
公开(公告)日:1983-09-14
New camptothecin derivatives of the general formula:
wherein R1 and R2 each stands for a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group and R and R2, taken together with the nitrogen atom to which they are attached, may form a cyclic group. These new derivatives are useful intermediates for preparing pharmaceuticals or other classes of new camptothecin derivatives. These present new derivatives are prepared by treating camptothecin-7--carboxylic acid first with a carboxyl group-activating reagent and then with ammonia or the corresponding amine.
通式如下的新喜树碱衍生物
其中 R1 和 R2 分别代表一个氢原子、一个取代或未取代的烷基、一个取代或未取代的芳基或一个取代或未取代的芳基,R 和 R2 与它们所连接的氮原子一起可形成一个环状基团。这些新衍生物是制备药物或其他类喜树碱新衍生物的有用中间体。这些新衍生物的制备方法是先用羧基活化试剂处理喜树碱-7-羧酸,然后用氨或相应的胺处理。