Cp*Co(III)-Catalyzed C–H/N–N Functionalization of Arylhydrazones for the Synthesis of Isoquinolines
作者:Amit B. Pawar、Darpan Agarwal、Dhanaji M. Lade
DOI:10.1021/acs.joc.6b02001
日期:2016.11.18
Cationic Co(III)-catalyzed C–H/N–N bond functionalization of arylhydrazones with internal alkynes has been developed for the synthesis of isoquinoline derivatives. The arylhydrazones are easy to prepare and require inexpensive and commercially available hydrazine hydrate. The reaction works well with a variety of internal alkynes and arylhydrazones and offers broad scope, good functional group tolerance
N–O Bond as External Oxidant in Group 9 Cp*M(III)-Catalyzed Oxidative C–H Coupling Reactions
作者:Xu-Ge Liu、Hui Gao、Shang-Shi Zhang、Qingjiang Li、Honggen Wang
DOI:10.1021/acscatal.7b00677
日期:2017.8.4
catalyzed by group 9 Cp*M(III) complexes. By using Cp*Rh(III)-catalyzed isocoumarin synthesis as a model reaction, experimental and theoretical mechanistic studies were conducted. The results concluded that the Rh(III)–Rh(I)–Rh(III) rather than the Rh(III)–Rh(V)–Rh(III) pathway is more likely involved in the mechanism, and both the C–H activation and oxidation of the Cp*Rh(I) species were involved in
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