Where HAS you been? A manganese‐mediated annulation of 2‐isocyanobiaryls with organoboronic acids is developed for the synthesis of a broad range of phenanthridinederivatives (see scheme). Mechanistic studies indicate that the reaction proceeds by the intramolecular homolytic aromatic substitution (HAS) of an imidoyl radical intermediate.
A Free Radical Cascade Cyclization of Isocyanides with Simple Alkanes and Alcohols
作者:Zejiang Li、Fenghua Fan、Jie Yang、Zhong-Quan Liu
DOI:10.1021/ol501461u
日期:2014.6.20
A copper-catalyzed free-radical cascade cyclization of isocyanides with simple alkanes and alcohols was developed, which allowed convenient access to various alkyl-substituted phenanthridines.