Aerobic Ru-catalyzed direct C2-olefination of N-heteroarenes with alkenes directed by a removable N-dimethylcarbamoyl group
作者:Luo-Qiang Zhang、Shiping Yang、Xiaolei Huang、Jingsong You、Feijie Song
DOI:10.1039/c3cc44787a
日期:——
A highly efficient and selective Ru-catalyzed direct C2-olefination of indoles, pyrroles, and carbazoles assisted by a removable N-dimethylcarbamoyl group has been developed by using O2 as the terminal oxidant. Both electron-deficient and unactivated alkenes are applicable to the protocol.
Regioselective C2 Oxidative Olefination of Indoles and Pyrroles through Cationic Rhodium(III)-Catalyzed CH Bond Activation
作者:Bin Li、Jianfeng Ma、Weijia Xie、Haibin Song、Shansheng Xu、Baiquan Wang
DOI:10.1002/chem.201301987
日期:2013.9.2
Be economic with your atoms! An efficient Rh‐catalyzedoxidative olefination of indoles and pyrroles with broad substrate scope and tolerance is reported (see scheme). The catalytic reaction proceeds with excellent regio‐ and stereoselectivity. The directing group N,N‐dimethylcarbamoyl was crucial for the reaction and could be removed easily.
Ruthenium-Catalyzed Regioselective C2 Alkenylation of Indoles and Pyrroles via C–H Bond Functionalization
作者:Bin Li、Jianfeng Ma、Weijia Xie、Haibin Song、Shansheng Xu、Baiquan Wang
DOI:10.1021/jo401579m
日期:2013.9.20
An efficient ruthenium-catalyzed oxidative coupling of indoles and pyrroles with various alkenes at the C2-position assisted by employing the N,N-dimethylcarbamoyl moiety as a directing group is reported. The catalytic reaction proceeds in an excellent regio- and stereoselective manner.
An efficient method for the synthesis of 3‐alkylated indoles is described. The oxidative cross‐couplingreaction of diphenylmethane derivatives with indoles at the C‐3 position was achieved employing the N,N‐dimethylcarbamoyl moiety as an auxiliary group in the presence of iron(II) chloride (FeCl2) and 2,3‐dichloro‐5,6‐dicyanoquinone (DDQ).
Elements of Regiocontrol in the Direct Heteroarylation of Indoles/Pyrroles: Synthesis of Bi- and Fused Polycyclic Heteroarenes by Twofold or Tandem Fourfold CH Activation
作者:Zhen Wang、Feijie Song、Yinsong Zhao、Yumin Huang、Lei Yang、Dongbing Zhao、Jingbo Lan、Jingsong You
DOI:10.1002/chem.201203004
日期:2012.12.21
strategies effectively switch the C2/C3‐site selectivity in the heteroarylation of indoles and pyrroles with N‐heteroarenes by a palladium‐catalyzed twofold CHactivation to form biheteroarenes and are further extended to the synthesis of complex fused tri‐ and tetracyclic heteroarenes by a tandem fourfold CHactivation (see scheme).