申请人:KABUSHIKI KAISHA YAKULT HONSHA
公开号:EP0325247A1
公开(公告)日:1989-07-26
New camptothecin derivatives and a process for preparing same are disclosed, which are represented by the general formula:
wherein R¹ represents a lower alkyl group, R² represents a hydrogen atom or an amino, hydroxyl, lower acylamino or lower alkoxy group, R³ represents a hydrogen or halogen atom or a lower alkyl, hydroxyl, lower alkoxy, nitro, amino, cyano or di(lower alkyl)amino group, R⁴ represents a hydrogen or halogen atom or a lower alkyl, hydroxyl, lower alkoxy, lower alkylthio, amino, cyano or di(lower alkyl)amino group, and R⁵ represents a hydrogen or halogen atom or a hydroxyl or lower alkoxy group, with the proviso that all of the R², R³, R⁴ and R⁵ substituents should not be a hydrogen atom and also that if any one of the R², R³, R⁴ and R⁵ is a hydroxyl or lower alkoxy group, all of the other three substituents should not be a hydrogen atom. The new camptothecin derivatives are useful as anti-tumor drugs or intermediates therefor.
本发明公开了新喜树碱衍生物及其制备方法,它们由通式表示:
其中 R¹ 代表低级烷基,R² 代表氢原子或氨基、羟基、低级酰氨基或低级烷氧基,R³ 代表氢原子或卤素原子或低级烷基、羟基、低级烷氧基、硝基、氨基、氰基或二(低级烷基)氨基,R⁴ 代表氢原子或卤素原子或低级烷基、羟基、低级烷氧基、低级烷硫基、氨基、氰基或二(低级烷基)氨基,以及 R⁵ 代表氢原子或卤素原子或低级烷基、羟基、低级烷氧基、低级烷硫基、氨基、氰基或二(低级烷基)氨基、R⁴代表氢原子、卤素原子或低级烷基、羟基、低级烷氧基、低级烷硫基、氨基、氰基或二(低级烷基)氨基,R⁵代表氢原子、卤素原子或羟基或低级烷氧基,但所有 R²、R³、R⁴ 和 R⁵ 取代基都不能是氢原子,而且如果 R²、R³、R⁴ 和 R⁵ 中的任何一个是羟基或低级烷氧基,则其他三个取代基都不能是氢原子。新喜树碱衍生物可用作抗肿瘤药物或其中间体。