A Mn(III)‐mediatedradicalcyclization reaction of o‐vinylaryl isocyanides and arylboronic acids or diphenylphosphine oxides to access various 2‐functionalized quinolines under mild conditions was developed. With the introduction of radical stabilizing substituents (e. g. aryl and methyl group) on vinyl group, this reaction provides a regiospecific 6‐endo‐trig radicalcyclization of o‐vinylaryl isocyanides
Lewis acid catalyzed reactivity switch: pseudo three-component annulation of nitrosoarenes and (epoxy)styrenes
作者:Anisha Purkait、Subhajit Saha、Santanu Ghosh、Chandan K. Jana
DOI:10.1039/d0cc02650f
日期:——
Lewis acid catalyzed alteration of annulation pattern allowed formation of arylquinolines via C–H functionalization of nitrosoarenes and C–C cleavage of (epoxy)styrene.
A palladium‐catalyzed [5+1] annulation of 2‐(1‐arylvinyl) anilines and α‐diazocarbonyl compounds has been developed, affording a series of multi‐functionalized quinolines in moderate to good yields. This procedure proceeded with the sequential insertion of N−H bond to the palladium carbene, intramolecular Heck reaction and decarboxylation steps. In this reaction, alkyl 2‐diazophenylacetates served
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.
Synthesis of Quinoline Derivatives by Multicomponent Reaction Using Niobium Pentachloride as Lewis Acid
作者:Aloisio de Andrade、Giovanny Carvalho dos Santos、Luiz Carlos da Silva-Filho
DOI:10.1002/jhet.1980
日期:2015.1
to investigate the use of NbCl5 as a Lewisacid in multicomponentreactions between benzaldehyde, aniline derivatives and phenylacetylene in the synthesis of quinolinederivatives. The effects of the temperature and substituents in the aromatic ring of the aniline were also evaluated. The reactions were carried out at low concentration of niobium and in relatively short reaction times, resulting in