A simple route for the synthesis of imidazole derivatives via copper-catalyzed [3 + 2] cycloaddition reaction is described. This strategy has achieved high regioselectivity and used oxygen as an oxidant without the addition of expensive catalysts to provide moderate to good yields.
Facile Synthesis of 1,2,4-trisubstituted Imidazoles via Aerobic Copper Catalyzed Ligand-free [3+2] Cycloaddition
作者:Wei Li、Weixiang Tian、Ming Lei
DOI:10.2174/1570178611666140207221202
日期:2014.4
A simple and facile approach to highly functionalized imidazole derivatives in moderate to good yields has
been developed. This method involves copper catalyzed aerobic [3+2] cycloaddition of amidines with nitroolefins in
absence of ligand. Based on observation of the intermediates, possible reaction mechanism different from the same
reported approach was proposed.