Synthesis of Polysubstituted Quinolines via Transition-Metal-Free Oxidative Cycloisomerization of o-Cinnamylanilines
摘要:
An efficient synthesis of 2-aryl 4-substituted quinolines from stable and readily available o-cinnamylanilines, prepared from anilines and cinnamylalcohols, has been developed. The reaction occurred via a regioselective 6-endo-trig intramolecular oxidative cyclization using (KOBu)-Bu-t as a mediator and DMSO as an oxidant at rt. The reaction showed a broad substrate scope with good to excellent yields.
One-Step Catalytic Synthesis of Alkyl-Substituted Quinolines
作者:Courtney E. Meyet、Catharine H. Larsen
DOI:10.1021/jo5015883
日期:2014.10.17
alkyl-substituted quinolines are formed directly from commercially available anilines, aldehydes, and alkynes bearing a variety of substituents. Copper(II) triflate catalyzes this three-componentcoupling without ligand, cocatalyst, solvent, or inert atmosphere. In addition, a two-component Povarov reaction forms 2,3-dialkyl quinolines under the same green conditions that enable the selective three-component synthesis
Efficient synthesis of 2,4-disubstituted quinolines: calix[n]arene-catalyzed Povarov-hydrogen-transfer reaction cascade
作者:Juliana Baptista Simões、Ângelo de Fátima、Adão Aparecido Sabino、Luiz Claudio Almeida Barbosa、Sergio Antonio Fernandes
DOI:10.1039/c4ra02036g
日期:——
A new calixarene-catalyzed cascade process, involving Povarov reaction and hydrogen transfer, for the synthesis of 2,4-disubstituted quinolines is described.
An efficient divergent functionalization of N‐alkylated ortho‐alkenylanilines to substituted indoles and quinolines has been accomplished by employing rhodium‐catalyzed cross‐dehydrogenative coupling and silver‐mediated oxidative cyclization, respectively. The developed methods tolerate various functional groups and allow the synthesis of substituted indoles and quinolines in good to excellent yield