C−C Bond Formation Catalyzed Heterogeneously by Nickel-on-Graphite (Ni/C<sub>g</sub>)
作者:Bruce H. Lipshutz、Tom Butler、Elizabeth Swift
DOI:10.1021/ol702453q
日期:2008.3.1
Inexpensive nickel(II) mounted on graphite (Ni/Cg) can be easily activated and used to heterogeneously catalyze cross-couplings involving aryl halides/tosylates with boronic acids, vinylalanes, and vinylzirconocenes. Comparisons are made with the charcoal analogue, Ni/C, and some unusual chemoselectivities between these catalysts have been uncovered.
Heterogeneous catalysis with nickel-on-graphite (Ni/C<sub>g</sub>)
作者:Tom A. Butler、Elizabeth C. Swift、Bruce H. Lipshutz
DOI:10.1039/b714600k
日期:——
Impregnation of nickel(II) onto graphite, upon reduction in situ, leads to a reagent that catalyzes both C-H and C-C bond formations between aryl halides, or aryl pseudo-halides, and various organometallics. Cross-couplings, most notably with tosylates, can lead to either reduced aromatics, biaryls, or styrenes as products under the influence of Ni/Cg. The catalyst is inexpensive, non-pyrophoric, and