Synthesis of 1,2-Fused/Disubstituted Benzimidazoles and Benzimidazolium Salts by I<sub>2</sub>-Mediated sp<sup>3</sup> C–H Amination
作者:Xiaofei Yi、Zongxiang Zhao、Manman Wang、Wenquan Yu、Junbiao Chang
DOI:10.1021/acs.orglett.2c03630
日期:2022.12.2
intramolecular sp3 C–H amination reaction of aniline derivatives has been established. This reaction employs molecular iodine (I2) under transition-metal-free conditions and produces 1,2-fused or 1,2-disubstituted benzimidazoles. This operationally simple synthetic process works well with N-substituted aniline substrates, forming novel benzimidazolium frameworks. Under the optimal reaction conditions, a broad variety
建立了苯胺衍生物的分子内sp 3 C-H胺化反应。该反应在无过渡金属的条件下使用分子碘 (I 2 ) 并生成 1,2-稠合或 1,2-二取代的苯并咪唑。这种操作简单的合成过程适用于N-取代苯胺底物,形成新型苯并咪唑骨架。在最佳反应条件下,多种 1,2-稠合/二取代苯并咪唑和苯并咪唑盐,包括几种生物活性化合物,以高效和可扩展的方式从易于获得的前体合成。