Carbamoylation of Aryl Halides by Molybdenum or Tungsten Carbonyl Amine Complexes
作者:Wei Ren、Motoki Yamane
DOI:10.1021/jo1002592
日期:2010.5.7
When aryl halide is treated with molybdenumcarbonyl amine complex in the presence of base, carbamoylation proceeds to give amide in good yield. The proposed mechanism involves oxidativeaddition of aryl halide to molybdenum(0) complex, migratory insertion to carbon monoxide giving acyl(amino)molybdenum(II) or aryl(carbamoyl)molybdenum(II) intermediate, and reductive elimination of the amide. This
Palladium-Catalyzed Carbamoylation of Aryl Halides by Tungsten Carbonyl Amine Complex
作者:Wei Ren、Motoki Yamane
DOI:10.1021/jo901486z
日期:2009.11.6
In the presence of aminepentacarbonyltungsten, base, and a catalytic amount of palladium(0) complex, carbamoylation of aryl halide proceeds to afford amide. The reaction may involve transmetalation between palladium(II) intermediate and carbamoyltungstenate that is generated in situ. This catalytic cross-coupling reaction provides an alternative method to the conventional palladium-catalyzed amidation