Synthesis of Quinolines via the Metal-free Visible-Light-Mediated Radical Azidation of Cyclopropenes
作者:Vladyslav Smyrnov、Bastian Muriel、Jerome Waser
DOI:10.1021/acs.orglett.1c01775
日期:2021.7.16
hypervalent iodine reagent as an azide radical source under visible-light irradiation. Multisubstituted quinoline products were obtained in 34–81% yield. The reaction was most efficient for 3-trifluoromethylcyclopropenes, affording valuable 4-trifluoromethylquinolines. The transformation probably proceeds through the cyclization of an iminyl radical formed by the addition of the azide radical on the
A Mild Palladium-Catalyzed Suzuki Coupling Reaction of Quinoline Carboxylates with Boronic Acids
作者:Wenjie Li、Joe J. Gao、Yongda Zhang、Wenjun Tang、Heewon Lee、Keith R. Fandrick、Bruce Lu、Chris H. Senanayake
DOI:10.1002/adsc.201100141
日期:2011.7
A palladium‐catalyzed cross‐coupling between aryl carboxylates and boronicacids has been achieved for the first time by taking advantage of the enhanced reactivity of quinoline 4‐carboxylates. Also for the first time a Suzukicouplingreaction via a self‐activation of boronicacids without addition of base is described. The reactions proceed under mild conditions (25–65 °C) to give excellent yields
Synthesis of 7-Chloroquinoline Derivatives Using Mixed Lithium-Magnesium Reagents
作者:Valter E. Murie、Paula V. Nicolino、Thiago dos Santos、Guido Gambacorta、Rodolfo H. V. Nishimura、Icaro S. Perovani、Luciana C. Furtado、Leticia V. Costa-Lotufo、Anderson Moraes de Oliveira、Ricardo Vessecchi、Ian R. Baxendale、Giuliano C. Clososki
DOI:10.1021/acs.joc.1c01521
日期:2021.10.1
We have prepared a library of functionalizedquinolines through the magnesiation of 7-chloroquinolines under mild conditions, employing both batch and continuous flow conditions. The preparation involved the generation of mixed lithium-magnesium intermediates, which were reacted with different electrophiles. Mixed lithium-zinc reagents allowed the synthesis of halogenated and arylated derivatives. Some
Visible-Light-Promoted and One-Pot Synthesis of Phenanthridines and Quinolines from Aldehydes and <i>O</i>-Acyl Hydroxylamine
作者:Xiao-De An、Shouyun Yu
DOI:10.1021/acs.orglett.5b01096
日期:2015.6.5
A one-pot synthesis of phenanthridines and quinolines from commercially available or easily prepared aldehydes has been reported. O-(4-Cyanobenzoyl)hydroxylamine was utilized as the nitrogen source to generate O-acyl oximes in situ with aldehydes catalyzed by Bronsted acid. O-Acyl oximes were then subjected to visible light photoredox catalyzed cyclization via iminyl radicals to furnish aza-arenes. A variety of phenanthridines and quinolines have been prepared assisted by Bronsted acid and photocatalyst under visible light at room temperature with satisfactory yields.