Catalyst free, three-component approach for unsymmetrical triarylmethanes (TRAMs)

An efficient catalyst free, three-component, cascade approach has been designed and developed for the rapid assembly of unsymmetrical triarylmethane framework. The strategy employed aromatic aldehydes, Grignard reagents, and neutral aromatics as reaction partners, under simple thermal conditions. This process affords very broad scope for all three partners as it is performed in the absence of any external additives.