124623-09-2Relevant articles and documents
Synthesis and antitumor activity of 20(S)-camptothecin derivatives. A-ring-substituted 7-ethylcamptothecins and their E-ring-modified water-soluble derivatives
Yaegashi,Sawada,Nagata,Furuta,Yokokura,Miyasaka
, p. 2518 - 2525 (1994)
Twenty-six novel A-ring-modified 7-ethylcamptothecins (6) were synthesized by Friedlander's condensation of the chiral tricyclic ketone (5) with aminopropiophenones (4). The compounds substituted with fluorine at the 11 position showed strong cytotoxicity
Camptothecin derivatives
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, (2008/06/13)
New campotothecin derivatives and a process for preparing same are disclosed, which are represented by the general formula: STR1 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.