Au(<scp>iii</scp>)-aryl intermediates in oxidant-free C–N and C–O cross-coupling catalysis
作者:Jordi Serra、Teodor Parella、Xavi Ribas
DOI:10.1039/c6sc03699f
日期:——
in oxidant-free C–O and C–N cross coupling catalysis. The crystal structures of cyclometalated neutral and cationic Au(III) species are described and their key role in 2 electron-redox Au(I)/Au(III) catalysis in C–O and C–N cross couplings is shown. Nucleophiles compatible with Au-catalyzed cross couplings include aromatic and aliphaticalcohols and amines, as well as water and amides.
Rh-Catalyzed Diarylamine Synthesis by Intermolecular C-H Amination of Heteroarylarenes
作者:Conghui Tang、Yizhi Yuan、Yuxin Cui、Ning Jiao
DOI:10.1002/ejoc.201301430
日期:2013.11
A novel and efficient Rh-catalyzedintermolecularC–Hamination of heteroarylarenes with aryl azides has been developed. This procedure does not require an oxidant, releases N2 as the only byproduct, and provides an efficient approach to diarylamines with broad functional-group tolerance.
Copper-Catalyzed Amidation of 2-Phenylpyridine with Oxygen as the Terminal Oxidant
作者:Alex John、Kenneth M. Nicholas
DOI:10.1021/jo200409h
日期:2011.5.20
The Cu(OAc)(2)-catalyzed, O-2-mediated amidation of 2-phenylpyridine via C-H bond activation is reported. A variety of nitrogen reagents including sulfonamides, carboxamides, and anilines participate in the reaction in moderate to good yields.
Mechanistic Studies of the Rhodium-Catalyzed Direct C–H Amination Reaction Using Azides as the Nitrogen Source
reaction usingorganicazides as the amino source. The most important two stages were investigated especially in detail: (i) the formation of metal nitrenoid species and its subsequent insertion into a rhodacycle intermediate, and (ii) the regeneration of catalyst with concomitant release of products. It was revealed that a stepwise pathway involving a key Rh(V)-nitrenoid species that subsequently undergoes