Effect of A-Ring Modifications on the DNA-Binding Behavior and Cytotoxicity of Pyrrolo[2,1-<i>c</i>][1,4]benzodiazepines
作者:David E. Thurston、D. Subhas Bose、Philip W. Howard、Terence C. Jenkins、Alberto Leoni、Pier G. Baraldi、Andrea Guiotto、Barbara Cacciari、Lloyd R. Kelland、Marie-Paule Foloppe、Sylvain Rault
DOI:10.1021/jm981117p
日期:1999.6.1
regiospecific cleavage reaction of the dioxole intermediate 18 was discovered, leading to the previously unknown iso-DC-81 (20). In addition, an unusual simultaneous nitration-oxidation reaction of 4-(3-hydroxypropoxy)-3-methoxybenzoic acid (8) was found to produce 3-(4-carboxy-2-methoxy-5-nitrophenoxy)propanoic acid (9), a key intermediate, in high yield. In general, the results of cytotoxicity and
为了研究结构反应性/细胞毒性关系,已合成了几种DNA结合抗肿瘤剂DC-81的A环修饰类似物(5)。对于两个分子(23和30),修饰需要加成第四个环,以得到新颖的dioxolo [4,5-h]-和dioxano [5,6-h] pyrrolo [2,1-c] [1, 4]分别为苯并二氮杂-1-酮(PBD)环系统。另外三个类似物(34、38和48)的天然苯环A环被吡啶,二嗪或嘧啶环取代,从而得到新颖的吡咯并[2,1-c] [1,4]吡啶二氮杂,吡咯并[2, 1-c] [1,4]二氮杂二氮卓和吡咯并[2,1-c] [1,4]嘧啶二氮杂卓系统。其他新的类似物(16a,b)在DC-81结构的C8位具有延伸的链。在这些化合物的合成过程中,发现了二恶唑中间体18的新型锡介导的区域特异性裂解反应,从而导致了以前未知的iso-DC-81(20)。另外,发现4-(3-羟基丙氧基)-3-甲氧基苯甲酸(8)的异常