申请人:Kabushiki Kaisha Yakult Honsha
公开号:US05061800A1
公开(公告)日:1991-10-29
New campotothecin derivatives and a process for preparing same are disclosed, which are represented by the general formula: ##STR1## wherein R.sup.1 represents a lower alkyl group, R.sup.2 represents a hydrogen atom or an amino, hydroxyl, lower acylamino or lower alkoxy group, R.sup.3 represents a hydrogen or halogen atom or a lower alkyl, hydroxyl, lower alkoxy, nitro, amino, cyano or di(lower alkyl)amino group, R.sup.4 represents a hydrogen or halogen atom or a lower alkyl, hydroxyl, lower alkoxy, lower alkylthio, amino, cyano or di(lower alkyl)amino group, and R.sup.5 represents a hydrogen or halogen atom or a hydroxyl or lower alkoxy group, with the proviso that all of the R.sup.2, R.sup.3, R.sup.4 and R.sup.5 substituents should not be a hydrogen atom and also that if any one of the R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is a hydroxyl or lower alkoxy group, all of the other three substituents should not be a hydrogen atom.
揭示了新的紫杉醇衍生物及其制备方法,其通式表示为:其中R.sup.1代表低碳基团,R.sup.2代表氢原子或氨基、羟基、低酰胺基或低烷氧基,R.sup.3代表氢原子或卤素原子或低碳基、羟基、低烷氧基、硝基、氨基、氰基或二(低碳基)氨基,R.sup.4代表氢原子或卤素原子或低碳基、羟基、低烷氧基、低烷硫基、氨基、氰基或二(低碳基)氨基,R.sup.5代表氢原子或卤素原子或羟基或低烷氧基,但要注意所有的R.sup.2、R.sup.3、R.sup.4和R.sup.5取代基不应为氢原子,且如果R.sup.2、R.sup.3、R.sup.4和R.sup.5中的任何一个是羟基或低烷氧基,其他三个取代基都不应为氢原子。