Ru-catalyzed aerobic oxidative coupling of arylboronic acids with arenes
作者:Hong Li、Wei Wei、Yuan Xu、Chao Zhang、Xiaobing Wan
DOI:10.1039/c0cc04322b
日期:——
A Ru-catalyzedoxidativecoupling of arenes with boronic acids using molecular oxygen via direct C-H activation is reported. Both the scope and the mechanism of the process are discussed.
据报道,使用分子氧通过直接CH活化,Ru催化了芳烃与硼酸的氧化偶联。讨论了过程的范围和机制。
Stoichiometric to catalytic reactivity of the aryl cycloaurated species with arylboronic acids: insight into the mechanism of gold-catalyzed oxidative C(sp<sup>2</sup>)–H arylation
作者:Qian Wu、Chenglong Du、Yumin Huang、Xingyan Liu、Zhen Long、Feijie Song、Jingsong You
DOI:10.1039/c4sc02070g
日期:——
and 3b) and [AuBr(Ph)(tpy)] (7), as well as the aryl gold(III) complex [AuCl2(Ph)(tpy)] (8) (tpy = 2-(o-tolyl)pyridine) as reliable models, we present a detailed study of the mechanism for gold(III)-catalyzed oxidative cross-coupling reactions between cycloaurable arenes and arylboronic acids. Here we report the direct evidence for a mechanistic proposal including arene C–H activation, transmetallation
基于明确的五元芳基金 ( III ) 配合物,[Au(tpy)X 2 ] ( 3a和3b ) 和 [AuBr(Ph)(tpy)] ( 7 ),以及芳基金 ( III ) 配合物 [AuCl 2 (Ph)(tpy)] ( 8 ) (tpy = 2-( o -tolyl)pyridine) 作为可靠的模型,我们对金 ( III ) 催化的氧化交叉反应机理进行了详细研究。可环芳芳烃和芳基硼酸之间的偶联反应。在这里,我们报告了机制建议的直接证据,包括芳烃 C-H 活化、金属转移和联芳基还原消除。螯合辅助的 C-H 活化策略已用于开发金 ( III ) 催化的芳烃与芳基试剂的 C-H 键芳基化,以形成扩展的 π 共轭体系。
A Highly Efficient Ruthenium(II) Catalyst with (1,2-Diarylvinyl)phosphine Ligands for Direct Ortho Arylation of 2-Arylpyridine with Aryl Chlorides
作者:Bingran Yu、Xiaoyu Yan、Song Wang、Ning Tang、Chanjuan Xi
DOI:10.1021/om100407q
日期:2010.7.26
were synthesized, and their ruthenium complexes have been prepared. The structure of [(1,2-diphenylvinyl)phosphine](η6-cymene)RuCl2 (C1) was confirmed by X-ray crystallography. Ruthenium (1,2-diarylvinyl)phosphine complexes are highly efficient catalysts for direct ortho arylation of 2-arylpyridine with a range of aryl chlorides (electron-rich and electron-poor aromatic chlorides). Highly controllable
Ambient temperatureruthenium‐catalyzedC−H arylations were accomplished by visiblelight without additional photocatalysts. The robustness of the ruthenium‐catalyzedC−H functionalization protocol was reflected by a broad range of sensitive functional groups and synthetically useful pyrazoles, triazoles and sensitive nucleosides and nucleotides, as well as multifold C−H functionalizations. Biscyclometalated