Synthesis, Chemical Properties, and Biological Evaluation of CC-1065 and Duocarmycin Analogues Incorporating the 5-Methoxycarbonyl-1,2,9,9a-tetrahydrocyclopropa[<i>c</i>]benz[<i>e</i>]indol-4-one Alkylation Subunit
作者:Dale L. Boger、Terry V. Hughes、Michael P. Hedrick
DOI:10.1021/jo001772g
日期:2001.4.1
the C5 methyl ester was found to decrease the rate (0.77x) of DNA alkylation relative to CBI, consistent with its inherent lower reactivity. These results indicate that the previously observed increase in the rate of DNA alkylation for C7-substituted CBI analogues including CCBI (7-cyano-CBI) is contrary to expectations based on their inherent reactivities. Unlike 17, in which the C5 methyl ester does
5-甲氧基羰基-1,2,9,9a-四氢环丙烷[c]苯并[e]吲哚-4-酮(C5-CO2Me-CBI),带有C5甲氧基羰基的取代CBI衍生物及其相应的5的合成描述了β-羟甲基衍生物以努力建立对试剂功能反应性的取代基电子作用以及由此产生的对其DNA烷基化速率的影响。还详细说明了立即C5-CO2Me-CBI前体的拆分及其在16和17对映异构体中的双杜霉素类似物的结合情况。对N-BOC-C5-CO2Me-CBI的溶剂分解反应性和区域选择性的研究(12)显示,引入C5甲酯可适度减慢溶剂分解速率(1.8x,pH 3),而不会改变固有的反应区域选择性( > 20:1)。C5-CO2Me-CBI和CBI的N-CO2Me衍生物的X射线结构比较显示与化合物的反应区域选择性和相对反应性相关。后者与反应性较低的C5-CO2Me-CBI密切相关,表现出较短的N2-C2a键长(1.386对1.390 A)和较小的Chi1二面角(8