Nickel-Catalyzed Tandem Cyclization of 1,6-Diynes with Indolines/Indoles through Dual C–H Bond Activation
Suresh Kumar Yadav, Masilamani Jeganmohan
Abstract
A nickel-catalyzed site-selective tandem cyclization of 1,6-diynes with substituted indolines or indoles through consecutive dual C-H bond activation is described. In the reaction, substituted fused indole and carbazole derivatives were observed in good to excellent yields, in which three consecutive C-C bonds formed in one pot. Later, in the presence of DDQ, the aromatization of the indoline derivative was converted to the indole derivative. A possible reaction mechanism involving dual C-H bond activation as a key step was proposed to account for the present reaction.
Topics & Concepts
ChemistryIndolineIndole testAromatizationCatalysisTandemCarbazoleDerivative (finance)Medicinal chemistryNickelCascade reactionCombinatorial chemistryStereochemistryPhotochemistryOrganic chemistryComposite materialFinancial economicsEconomicsMaterials scienceCatalytic C–H Functionalization MethodsCatalytic Alkyne ReactionsCatalytic Cross-Coupling Reactions