Formation of Amidinyl Radicals via Visible-Light-Promoted Reduction of <i>N</i>-Phenyl Amidoxime Esters and Application to the Synthesis of 2-Substituted Benzimidazoles
作者:Gang Li、Ru He、Qiang Liu、Ziwen Wang、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.joc.9b01158
日期:2019.7.5
We have developed a new method for the synthesis of 2-substituted benzimidazoles via amidinyl radicals generated by visible-light-promoted reduction of N-phenyl amidoxime esters in the presence of an iridium photocatalyst. This is the first report of the use of N-phenyl amidoxime esters as amidinyl radical precursors, and the first use of substituted benzene rings as amidinyl radical acceptors. This