摘要
Gold-catalyzed oxidative cross-coupling reactions of two distinct arenes with one gold carbene furnish triarylmethane products. Notably, competitive homo-coupling reactions are efficiently suppressed with a phosphoric acid as co-catalyst (10 mol%) in THF. These cross-coupling reactions have a wide scope of applicable substrates, with respect to indoles, arylamines, and α-aryl diazo cyanides or esters. Our mechanistic analysis indicates that the basicity of the arylanilines greatly affects the cross-coupling efficiency. (Figure presented.).