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 using Xantphos 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 atmospheric pressure. In addition, a putative catalytic intermediate, (Xanphos)Pd(Br)benzoyl, was prepared and an X-ray crystal structure
已经开发了一种使用 Xantphos 作为配体的 Pd 催化的芳基溴化物羰基化方法。该方法对于在大气压下从相应的芳基溴化物直接合成 Weinreb 酰胺、伯和仲苯甲酰胺以及甲酯是有效的。此外,制备了一种假定的催化中间体,(Xanphos)Pd(Br)苯甲酰基,并获得了 X 射线晶体结构,揭示了这种钯-酰基配合物中 Xantphos 的不寻常的顺式配位模式。