Ruthenium-Catalyzed Direct C–H Bond Arylations of Heteroarenes
作者:Lutz Ackermann、Alexander V. Lygin
DOI:10.1021/ol2010648
日期:2011.7.1
Ruthenium-catalyzedC–Hbondarylations of indoles, thiophenes, and pyrroles were accomplished in a highly chemo- and site-selective manner through the use of removable directing groups.
Ru-Catalysed CH Arylation of Indoles and Pyrroles with Boronic Acids: Scope and Mechanistic Studies
作者:Carina Sollert、Karthik Devaraj、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/chem.201405931
日期:2015.3.27
The Ru‐catalysed C2Harylation of indoles and pyrroles by using boronicacids under oxidative conditions is reported. This reaction can be applied to tryptophan derivatives and tolerates a wide range of functional groups on both coupling partners, including bromides and iodides, which can be further derivatised selectively. New indole‐based ruthenacyclic complexes are described and investigated as
selective divergentcoupling reactions of benzocyclobutenones and indoles, in which the chemoselectivity is controlled by catalysts, are reported herein. The substrates undergo C2(indole)–C8(benzocyclobutenone) coupling to produce benzylated indoles and benzo[b]carbazoles in the Ni‐ and Ru‐catalyzed reactions. A completely different selectivity pattern C2(indole)–C2(benzocyclobutenone) coupling to form
Divergent Annulative C–C Coupling of Indoles Initiated by Manganese-Catalyzed C–H Activation
作者:Bingxian Liu、Jie Li、Panjie Hu、Xukai Zhou、Dachang Bai、Xingwei Li
DOI:10.1021/acscatal.8b02560
日期:2018.10.5
Manganese(I)-catalyzed C–Hactivation of indoles and divergent annulative coupling with alkyne-tethered cyclohexadienones has been realized under operationally simple conditions. These annulation systems are under condition control. The coupling in the presence of BPh3 additive followed a C–H activation-alkyne insertion-Michael addition pathway, affording an exocyclic olefin attached to a tetrahydrofuran
The hydroarylation of allenes via C–H activation was achieved with a versatile cationic cobalt(III) catalyst. Step- and atom-economical access to alkenylated heteroarenes is thus provided in a highly chemo- and regioselective manner. Detailed mechanistic studies were conducted, including kinetic studies and Hammett analysis, suggesting the catalytic cycle being initiated with a reversible N-ligand