Structure-activity relationships of cyclic enediynes related to dynemicin A—II. Synthesis and antitumor activity of 9- and 12-substituted enediynes equipped with aryl carbamate moieties
作者:Ryoichi Unno、Hisashi Michishita、Hideaki Inagaki、Yoko Suzuki、Yutaka Baba、Takahito Jomori、Masatoshi Moku、Toshio Nishikawa、Minoru Isobe
DOI:10.1016/s0968-0896(97)00027-8
日期:1997.5
Novel enediyne compounds 4-8, simple analogues of dynemicin A (1) equipped with the phenyl or 4-chlorophenyl carbamate moiety, were synthesized and evaluated for DNA-cleaving ability, in vitro cytotoxicity, and in vivo antitumor activity. As a result of the SAR study, it was revealed that the size and character of the substituents (R1 and R2) at the C9 position critically influenced both the stability
合成了新的烯二炔化合物4-8,即带有苯或4-氯苯基氨基甲酸酯部分的达尼霉素A(1)的简单类似物,并对其DNA裂解能力,体外细胞毒性和体内抗肿瘤活性进行了评估。SAR研究的结果表明,C9位置的取代基(R1和R2)的大小和特征严重影响烯二炔化合物的稳定性和抗肿瘤活性。我们发现9-脱氧化合物6a是一种稳定且体积较小的烯二炔,具有氢作为R1和R2取代基,在日剂量为2.0 mg / kg的情况下,T / C为215%,具有显着的体内活性。 4天。含氧官能团作为苯环上的R3取代基的引入导致体内和体外的效力大大降低。在一系列的9-酰氧基化合物中,碱性芳族部分如8e的掺入对于体外活性是有效的,但是对于体内活性却是无效的。此外,对于C9位置的立体化学-活性关系,发现8c,8e和8f的(9R *)异构体在体外和体内均显示出比相应的(9S *)异构体更高的水平。对于机理研究,化合物6a在酸性条件下通过双自由基途