Palladium-Catalyzed Carbonylation Reactions of Aryl Bromides at Atmospheric Pressure: A General System Based on Xantphos
作者:Joseph R. Martinelli、Donald A. Watson、Dominique M. M. Freckmann、Timothy E. Barder、Stephen L. Buchwald
DOI:10.1021/jo801279r
日期:2008.9.19
A method for the Pd-catalyzed carbonylation of aryl bromides has been developed usingXantphos as the ligand. This method is effective for the direct synthesis of Weinreb amides, primary and secondary benzamides, and methyl esters from the corresponding aryl bromides at atmosphericpressure. In addition, a putative catalytic intermediate, (Xanphos)Pd(Br)benzoyl, was prepared and an X-ray crystal structure