Pyridyl Radical Cation for C−H Amination of Arenes
作者:Simon L. Rössler、Benson J. Jelier、Pascal F. Tripet、Andrej Shemet、Gunnar Jeschke、Antonio Togni、Erick M. Carreira
DOI:10.1002/anie.201810261
日期:2019.1.8
and unprecedented N‐pyridyl radical cation from selected N‐substituted pyridinium reagents. The resulting C(sp2)−H functionalization of (hetero)arenes furnishes versatile intermediates for the development of valuable aminated aryl scaffolds. Mechanistic studies that include the first spectroscopic evidence of a spin‐trapped N‐pyridyl radical adduct implicate SET‐triggered, pseudo‐mesolytic cleavage