Reversed and Sandwiched Analogs of Duocarmycin SA: Establishment of the Origin of the Sequence-Selective Alkylation of DNA and New Insights into the Source of Catalysis
作者:Dale L. Boger、Bernd Bollinger、Donald L. Hertzog、Douglas S. Johnson、Hui Cai、Philippe Mésini、Robert M. Garbaccio、Qing Jin、Paul A. Kitos
DOI:10.1021/ja9637210
日期:1997.5.1
selectivity. In addition, dramatic alterations in the rates of DNA alkylation were observed among the agents and correlate with the presence or absence of an extended, rigid N2 amide substituent. This has led to the proposal of a previously unrecognized source of catalysis for the DNA alkylation reaction which was introduced in the preceding paper of this issue (J. Am. Chem. Soc. 1997, 119, 4977−4986)
描述了两种独特类别的 duocarmycin SA 类似物的合成和检查,我们将其称为反向和夹心类似物。他们的研究确定了 DNA 烷基化选择性的起源,以及这类天然产物的两种对映异构体都具有相同的多核苷酸识别特征。这方面最美妙的证明是反向类似物的对映体烷基化选择性的完全转换,这仅与非共价结合模型一致,与 DNA 烷基化选择性起源的烷基化位点模型不兼容。此外,在试剂中观察到 DNA 烷基化速率的显着变化,并且与扩展的刚性 N2 酰胺取代基的存在或不存在相关。