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    • 8. 发明授权
    • Camptothecin derivatives, preparations thereof and antitumor agents
    • 喜树碱衍生物,其制剂和抗肿瘤剂
    • US5843954A
    • 1998-12-01
    • US976398
    • 1997-11-21
    • Takashi YaegashiSeigo SawadaTomio FurutaTeruo Yokokura
    • Takashi YaegashiSeigo SawadaTomio FurutaTeruo Yokokura
    • A61K31/47A61K31/4745A61P35/00C07D209/00C07D221/00C07D471/14C07D487/02
    • C07D471/14
    • New camptothecin derivatives of the general formula (1): ##STR1## wherein R.sup.1 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, R.sup.2 represents a hydrogen or a C.sub.1 -C.sub.6 alkoxy group, R.sup.3 represents a hydrogen or halogen atom or a C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, hydroxyl, C.sub.2 -C.sub.6 acyloxy or methoxyethoxymethoxy group, R.sup.4 represents a hydrogen or halogen atom, and R.sup.5 represents a C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 unsaturated alkyl, alkylthioalkyl, alkoxyalkyl, pyridyl or substituted phenyl group, with the proviso that all of the R.sup.2, R.sup.3 and R.sup.4 substituents should not be a hydrogen atom, and a process for preparing the new camptothecin derivatives by subjecting the camptothecin derivatives of the general formula (2): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the same meanings as given above, to the reaction with N,N-dimethylethylenediamine without solvent to open the E-lactone ring followed by acylation of 17-hydroxyl group with corresponding acylating agents and an antitumor agent containing the same as an active ingredient.
    • (1)的新喜树碱衍生物:其中R1表示氢原子或C1-C6烷基,R2表示氢或C1-C6烷氧基,R3表示氢或卤素原子 或C 1 -C 6烷基,C 1 -C 6烷氧基,羟基,C 2 -C 6酰氧基或甲氧基乙氧基甲氧基,R 4表示氢或卤素原子,R 5表示C 1 -C 6烷基,C 3 -C 6不饱和烷基,烷硫基烷基,烷氧基烷基,吡啶基 或取代的苯基,条件是所有的R 2,R 3和R 4取代基不应该是氢原子,以及通过使通式(2)的喜树碱衍生物进行制备来制备新的喜树碱衍生物的方法: (2)其中R 1,R 2,R 3和R 4具有与上述相同的含义,与没有溶剂的N,N-二甲基乙二胺反应以打开E-内酯环,随后用相应的酰化剂酰化17-羟基, 含有与活性物质相同的抗肿瘤剂 e成分。