Functional analogs of CC-1065 and the duocarmycins incorporating the 9a-(chloromethyl)-1,2,9,9a-tetrahydrocyclopropa[c]benz[e]indol-4-one (C2BI) alkylation subunit: synthesis and preliminary DNA alkylation studies
作者:Dale L. Boger、Moorthy S. S. Palanki
DOI:10.1021/ja00050a012
日期:1992.11
concise and effective nine to ten step synthesis of 9a-(chloromethyl)-1,2,9,9a-tetrahydrocyclopropa[c]benz[e]indol-4-one (C 2 BI) is detailed based on the implementation of a key 5-exo-trig aryl radical-alkene cyclization for direct introduction of a selectively protected 3,3-bis(hydroxymethyl)indoline. The incorporation of C 2 BI into functional analogs of CC-1065 and the duocarmycins (C 2 BI-CDPI 1
9a-(氯甲基)-1,2,9,9a-四氢环丙[c]benz[e]indol-4-one (C 2 BI)的简洁有效的九到十步合成基于用于直接引入选择性保护的 3,3-双(羟甲基)二氢吲哚的关键 5-exo-trig 芳基-烯烃环化。描述了将 C 2 BI 掺入 CC-1065 和双癌霉素(C 2 BI-CDPI 1 、C 2 BI-CDPI 2 、C 2 BI-TMI 和 C 2 BI-indole 2 )的功能类似物。基本原理在研究中详细说明了 N-BOC-C 2 BI 的溶剂分解行为 (t 1/2 =433 h,pH=3),研究表明该试剂比真正的 CC-1065 烷基化亚基稳定约 12 倍,并且它参与立体电子控制的反应,亲核加成到最少取代的环丙烷碳上。