Palladium-catalyzed Suzuki–Miyaurareaction is an important synthetic strategy for the synthesis of biaryl compounds. This work describes that palladiumcomplexes with N,O-bidentate ligands bearing N-oxide units from cyclic secondary amines were used as highly efficient catalysts for Suzuki–Miyaurareactions of aryl halides with arylboronic acids. The reaction exhibited good functional group compatibility
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.