Synthesis, X-ray Structure, and Properties of Fluorocyclopropane Analogs of the Duocarmycins Incorporating the 9,9-Difluoro-1,2,9,9a-tetrahydrocyclopropa[<i>c</i>]benzo[<i>e</i>]indol-4-one (F<sub>2</sub>CBI) Alkylation Subunit
作者:Dale L. Boger、Tracy J. Jenkins
DOI:10.1021/ja961888n
日期:1996.1.1
(24) provided a key analog of the duocarmycins. A study of the solvolysis of N-BOC-F2CBI (19) revealed that introduction of the difluorocyclopropane substitution increased the reactivity 500× without altering the inherent regioselectivity which occurred with nucleophilicaddition to the difluoro substituted C9 cyclopropane carbon. A single-crystal X-ray structure analysis of 17 and its comparison with