Nickel Catalyzed Cross-Couplingand Amination Reactions of Aryl Nitriles
作者:Joseph Miller、John Dankwardt、Jonathan Penney
DOI:10.1055/s-2003-40873
日期:2003.8
Arylnitriles have been found to participate in cross-coupling and amination reactions via nickel-catalyzed activation of the C-CNbond. With the development of these synthetically useful transformations, arylnitriles can now be considered along with aryl halides and sulfonates as viable substrates for these types of reactions.
Copper-catalyzed [2+3]-annulation of N–H imines with vinyl azides: access to polyaryl 2<i>H</i>-imidazoles
作者:Zhongzhi Zhu、Hanze Lin、Baihui Liang、Junjie Huang、Wanyi Liang、Lu Chen、Yubing Huang、Xiuwen Chen、Yibiao Li
DOI:10.1039/c9cc10042c
日期:——
A practical method for the synthesis of 2H-imidazoles via a [2+3] annulation of N-H imines with vinylazides using a copper catalyst is developed. In this conversion, environmentally friendly oxygen is used as the sole oxidant and N2 and H2O are the only by-products. The catalytic transformation, operating under mild conditions, is operationally simple and is considered as a readily available catalytic
Selective Oxidative [4+2] Imine/Alkene Annulation with H<sub>2</sub>
Liberation Induced by Photo-Oxidation
作者:Xia Hu、Guoting Zhang、Faxiang Bu、Aiwen Lei
DOI:10.1002/anie.201711359
日期:2018.1.26
The oxidative [4+2] annulationreaction represents an elegant and versatile syntheticprotocol for the construction of six‐membered heterocyclic compounds. Herein, a photoinduced oxidative [4+2] annulation of NH imines and alkenes was developed by utilizing a dual photoredox/cobaloxime catalytic system. Various multisubstituted 3,4‐dihydroisoquinolines can be obtained in good yields. This method is
Ruthenium(II)/N-Heterocyclic Carbene Catalyzed [3+2] Carbocyclization with Aromatic NH Ketimines and Internal Alkynes
作者:Jing Zhang、Angel Ugrinov、Pinjing Zhao
DOI:10.1002/anie.201209031
日期:2013.6.24
which occurs at ambient temperature, in the absence of oxidants or other metal salts, and in nonpolar solvents. A proposed mechanism involves imine‐directed activation of an aromatic CH bond, alkyne insertion, and carbocyclization by intramolecular imine insertion into Ru–alkenyl linkages.
方便且高效:使用标题反应合成茚胺,该反应在环境温度、不存在氧化剂或其他金属盐的情况下以及在非极性溶剂中发生。提出的机制涉及芳族 C - H 键的亚胺定向活化、炔烃插入以及通过分子内亚胺插入 Ru-烯基键进行碳环化。
(Pentamethylcyclopentadienyl)cobalt(III)-Catalyzed Oxidative [4+2] Annulation of NH Imines with Alkynes: Straightforward Synthesis of Multisubstituted Isoquinolines
作者:Shang-Shi Zhang、Xu-Ge Liu、Shi-Yong Chen、Dong-Hang Tan、Chun-Yong Jiang、Jia-Qiang Wu、Qingjiang Li、Honggen Wang
DOI:10.1002/adsc.201600025
日期:2016.5.19
A synthetic method for isoquinoline synthesis via a [4+2] annulation of NH imines with alkynes using the high‐valent (pentamethylcyclopentadienyl)cobalt(III) [Cp*Co(III)] catalyst is described. Cerium(IV) sulfate was found to be an efficient oxidant in lieu of the commonly used copper or silver salts. Broad substrate scope, high functional group tolerance, and generally good yields were observed.