(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.
An efficient synthesis of isoquinolines via rhodium-catalyzed direct C–H functionalization of arylhydrazines
作者:Sai Zhang、Daorui Huang、Guangyang Xu、Shengyu Cao、Rong Wang、Shiyong Peng、Jiangtao Sun
DOI:10.1039/c5ob01171j
日期:——
Rhodium-catalyzed C–H bond activation of arylhydrazines and coupling with internal alkynes has been realized.
铑催化的芳基肼的C-H键活化并与内部炔烃偶联已经实现。
Cobalt-catalyzed redox-neutral synthesis of isoquinolines: C–H activation assisted by an oxidizing N–S bond
作者:Fen Wang、Qiang Wang、Ming Bao、Xingwei Li
DOI:10.1016/s1872-2067(16)62491-9
日期:2016.8
A redox-neutral avenue to access isoquinolines has been realized by a Co(Ⅲ)-catalyzed C-H activation process. Starting from readily available N -sulfinyl imine substrates and alkynes, the reaction occurred via N-S cleavage with broad substrate scope and functional group compatibility in the presence of cost-effective cobalt catalysts.
The rhodium-catalyzed oxidative coupling of aromatic imines with alkynes effectively proceeds viaregioselective C-H bond cleavage to produce indenone imine and isoquinoline derivatives.
Microwave-Assisted, Rhodium(III)-Catalyzed N-Annulation Reactions of Aryl and α,β-Unsaturated Ketones with Alkynes
作者:Hyejeong Lee、Yong-Kyun Sim、Jung-Woo Park、Chul-Ho Jun
DOI:10.1002/chem.201302699
日期:2014.1.3
New RhIII‐catalyzed, one‐pot N‐annulation reactions of aryl and α,β‐unsaturated ketones with alkynes in the presence of ammonium acetate have been developed. Under microwave irradiation conditions, the processes lead to rapid formation of the respective isoquinoline and pyridine derivatives with efficiencies that are strongly dependent on the steric nature of the aryl ring and enone substituents. By