(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.
Synthesis of Isoquinolines via Rhodium(III)-Catalyzed Dehydrative CC and CN Coupling between Oximines and Alkynes
作者:Xingping Zhang、Dan Chen、Miao Zhao、Jing Zhao、Aiqun Jia、Xingwei Li
DOI:10.1002/adsc.201000887
日期:2011.3.28
synthesized from the redox‐neutral dehydrative CN and CC cross‐coupling between oximines and alkynes using a catalytic amount of (pentamethylcyclopentadiene)rhodium dichloride dimer [RhCp*Cl2]2} and cesium acetate (CsOAc), a process that involves ortho CH activation of oximines and subsequent functionalization with alkynes. This redox‐neutral catalytic isoquinoline synthesis operates under mild conditions