catalytic reactions using transition metals is an important challenge in organic chemistry in which the intermediates are related to those produced in the classical cross-couplingreactions. As part of our research program devoted to the development of metal-catalyzed reactions using indium organometallics, a protocol for the C⁻H activation and C⁻C coupling of 2-arylpyridines with triorganoindium reagents
Palladium-Catalyzed Methylation of Aryl C−H Bond by Using Peroxides
作者:Yuhua Zhang、Jianqing Feng、Chao-Jun Li
DOI:10.1021/ja0775063
日期:2008.3.1
A novel Pd(OAc)2-catalyzed methylation reaction by dicumylperoxide via aryl C−H bond activation was discovered. Various 2-phenylpyridine and acetanilides can be used as reactants in these reactions. Peroxide was used as both the methylatingreagent and the hydrogenacceptor.
Treatment of gem-di(iodozincio)methane with pyridine or diamine derivatives resulted in the isolation of a storable gem-di(iodozincio)methane species. Use of the sterically bulky bipyridine ligand gave a gem-di(iodozincio)methane complex, which allowed the first X-ray structural analysis of such species. This work represents a rare example of the isolation of an organometallic reactive species in Schlenk
An Experimentally Derived Model for Stereoselectivity in the Aerobic Oxidative Kinetic Resolution of Secondary Alcohols by (Sparteine)PdCl<sub>2</sub>
作者:Raissa M. Trend、Brian M. Stoltz
DOI:10.1021/ja039551q
日期:2004.4.1
induction in palladium-catalyzed aerobic oxidative kinetic resolution is described. The model is based on coordination complexes and general reactivity trends of the parent (sp)PdCl2 catalyst. The first example of a nonracemic chiral palladium alkoxide complex is presented, and exhibits the subtle steric influences of the C1 symmetric ligand sparteine.
Expanded ring diaminocarbene palladium complexes: synthesis, structure, and Suzuki–Miyaura cross-coupling of heteroaryl chlorides in water
作者:Eugene L. Kolychev、Andrey F. Asachenko、Pavel B. Dzhevakov、Alexander A. Bush、Viacheslav V. Shuntikov、Victor N. Khrustalev、Mikhail S. Nechaev
DOI:10.1039/c3dt32860k
日期:——
and characterized structurally in the solid state. The influence of ring size (5, 6 or 7) and bulkiness of N-aryl substituents (Mes = 2,4,6-trimethylphenyl, or Dipp = 2,6-diisopropylphenyl) in carbenes on palladium catalysed Suzuki–Miyaura cross-coupling was revealed. Due to the unique stereoelectronic properties of expanded ring NHCs, a versatile, highly efficient green protocol of coupling of heteroaromatic