作者:Connor J. O’Brien、Daniel G. Droege、Alexander Y. Jiu、Shivaani S. Gandhi、Nick A. Paras、Steven H. Olson、Jay Conrad
DOI:10.1021/acs.joc.8b01146
日期:2018.8.17
The versatile nitrile synthon is introduced as a radical generated from bromoacetonitrile, a photocatalyst, and blue LED as a light source. The mechanism of the reaction is explored by determination of the Stern–Volmer quenching constants. By combining photophysical data and mass spectrometry to follow the catalyst decomposition, the catalyst ligands were tuned to enable synthetically useful yields
吲哚在2-或3-位的直接氰甲基化是通过光氧化还原催化实现的。多功能腈合成子是由溴乙腈、光催化剂和蓝色 LED 作为光源产生的自由基。通过测定 Stern-Volmer 猝灭常数来探索该反应的机理。通过结合光物理数据和质谱分析来跟踪催化剂分解,调整催化剂配体以实现自由基偶联产物的合成有用产率。一系列带有烷基、芳基、卤素、酯和醚官能团的吲哚底物参与反应,产生产率 16-90% 的产物。该反应可以快速构建合成上有用的氰基甲基吲哚,否则需要几个合成步骤的产物。