Synthesis and Evaluation of 1,2,8,8a-Tetrahydrocyclopropa[<i>c</i>]pyrrolo[3,2-<i>e</i>]indol-4(5<i>H</i>)-one, the Parent Alkylation Subunit of CC-1065 and the Duocarmycins: Impact of the Alkylation Subunit Substituents and Its Implications for DNA Alkylation Catalysis
作者:Dale L. Boger、Alejandro Santillán、Mark Searcey、Steven R. Brunette、Scott E. Wolkenberg、Michael P. Hedrick、Qing Jin
DOI:10.1021/jo000297j
日期:2000.6.1
8a-tetrahydrocyclopropa[c]pyrrolo[3, 2-e]indol-4(5H)-one (CPI), the parent CC-1065 and duocarmycin SA alkylation subunit, is detailed. The parent CPI alkylation subunit lacks the C7 methyl substituent of the CC-1065 alkylation subunit and the C6 methoxycarbonyl group of duocarmycin SA, and their examination permitted the establishment of the impact of these natural product substituents. The studies revealed a CPI
详细介绍了1,2,8,8a-四氢环丙烷[c]吡咯并[3,2-e]吲哚-4(5H)-一个(CPI),母体CC-1065和双卡霉素SA烷基化亚基的合成。母体CPI烷基化亚基缺少CC-1065烷基化亚基的C7甲基取代基和杜卡霉素SA的C6甲氧羰基基团,通过对其进行的检查,可以确定这些天然产物取代基的影响。研究表明,CPI稳定性与CC-1065烷基化亚基相当,但与(+)-杜卡霉素SA烷基化亚基相比,其反应性高6倍,并且显示出天然产物固有的反应区域选择性(4:1)。(+)-N-BOC-CPI的单晶X射线结构描绘了环丙烷几乎相同的立体电子排列,这说明了相对于(+)-N-BOC-而言相同的反应区域选择性和略微减少的乙烯基酰胺共轭。 DSA表明,稳定性的区别部分是由于乙烯基酰胺的这种差异以及稠合吡咯的电子性质的改变。DNA结合特性的建立表明,基于CPI的试剂保留了天然产物相同的DNA烷基化选择性。更重要的