This study investigated the effect of oxygen substituents in the benzoyl part of N-(2-iodophenyl)benzamide on the coupling position in its Pd-assisted biaryl couplingreaction. Benzamide with methylenedioxy and acyloxy groups yielded the ortho-product formed predominantly by connection to a more hindered carbon. The mechanism is discussed from the perspectives of both steric and coordinated effects
A palladium reagent prepared from Pd (OAc)(2) (0.2 eq) and n-Bu3P (0.6 eq) catalyzed an aryl-aryl coupling reaction. This procedure is effective for coupling reactions of aryl triflate possessing no oxygen groups with arene, and of aryl iodide with arene.