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.
Visible-Light Photoredox-Catalyzed Iminyl Radical Formation by N–H Cleavage with Hydrogen Release and Its Application in Synthesis of Isoquinolines
作者:Wan-Fa Tian、Dang-Po Wang、Shao-Feng Wang、Ke-Han He、Xiao-Ping Cao、Yang Li
DOI:10.1021/acs.orglett.8b00193
日期:2018.3.2
An unprecedented visible-light photoredox-catalyzed iminyl radical formation by N-H cleavage with H2 release has been developed. Itsapplication in the synthesis of various isoquinolines and related polyaromatics in high atom economy at ambient temperature by applying a photosensitizer, Acr+-Mes ClO4-, and a new cobalt catalyst, Co(dmgH)2(4-CONMe2Py)Cl is reported. Mechanistic investigations indicated
Realized C–H Functionalization of Aryldiazo Compounds via Rhodium Relay Catalysis
作者:Lin Qiu、Daorui Huang、Guangyang Xu、Zhenya Dai、Jiangtao Sun
DOI:10.1021/acs.orglett.5b00674
日期:2015.4.3
An unprecedented C-H functionalization of aryldiazo compounds without a preinstallation of directing group has been realized under mild conditions, which differs from former reports in its use of diazo compounds as coupling partners in directed C-H activations. This novel transformation has been realized by a rhodium self-relay catalysis, a tandem process of the in situ formation of a directing group and sequential C-H bond activation.
Rhodium-Catalyzed Oxidative Coupling of Aryl Hydrazones with Internal Alkynes: Efficient Synthesis of Multisubstituted Isoquinolines
作者:Bin Xu、Wenting Liu、Xiaohu Hong
DOI:10.1055/s-0033-1338417
日期:——
Abstract An efficient rhodium-catalyzedoxidativecoupling reaction has been developed that gives high yields of multisubstituted isoquinolines from easily accessible aryl hydrazones and internal alkynes. Indenone hydrazone can also be synthesized in high yield from the corresponding benzaldehyde hydrazone by using this approach. An efficient rhodium-catalyzedoxidativecoupling reaction has been developed