A Catalytic Reaction of Alkynes via Multiple-Site Functionalization
作者:Subramanian Karur、S. R. S. Saibabu Kotti、Xin Xu、John F. Cannon、Allan Headley、Guigen Li
DOI:10.1021/ja0304188
日期:2003.11.1
The first multiple-site activation of alkynes with amine/halogen functionalities has been established. The reaction was performed by treating alkyne with N,N-dichlorobenzenesulfonamide at 80 degrees C in the presence of palladium acetate catalyst. A new mechanism was proposed which involves the novel formation of beta-halovinyl palladium and pi-allylpalladium species. Excellent regio- and stereoselectivities were achieved with the absolute structure determined by X-ray structural analysis.
Highly active iridium(i) complexes for the selective hydrogenation of carbon–carbon multiple bonds
作者:Linsey S. Bennie、Calum J. Fraser、Stephanie Irvine、William J. Kerr、Shalini Andersson、Göran N. Nilsson
DOI:10.1039/c1cc14367k
日期:——
New iridium(I) complexes, bearing a bulky NHC/phosphine ligand combination, have been established as extremely efficient hydrogenation catalysts that can be used at low catalyst loadings, and are compatible with functional groups which are often sensitive to more routinely employed hydrogenation methods.
Reduction of alkynes into 1,2-dideuterioalkenes with hexamethyldisilane and deuterium oxide in the presence of a palladium catalyst
作者:Eiji Shirakawa、Hidehito Otsuka、Tamio Hayashi
DOI:10.1039/b512245g
日期:——
A combination of hexamethyldisilane and deuterium oxide was found to work as a deuterium transfer reagent for alkynes in the presence of a catalytic amount of a palladium complex to give (E)-1,2-dideuterioalkenes selectively through the corresponding (Z)-isomer.