Carbon annulation of ortho-vinylanilines with dimethyl sulfoxide to access 4-aryl quinolines
作者:Jin Yuan、Jin-Tao Yu、Yan Jiang、Jiang Cheng
DOI:10.1039/c6ob02714h
日期:——
A palladium-catalyzed annulation of ortho-vinylanilines with dimethylsulfoxide was developed to access 4-aryl quinolines in moderate to good yields. Activated by 1,4-diazabicyclo[2.2.2]octane bis(sulfur dioxide) adduct (DABSO), DMSO served as a “CH–” fragment in this transformation. It represents a facile pathway leading to 4-aryl quinolines.
A copper-mediated formal [5 + 1] oxidative annulation of 2-vinylanilines and glyoxylic acid to 4-arylated quinolines was developed. A series of 4-arylated quinoline derivatives were obtained in good to excellent yields. This protocol could be carried out efficiently on gram scale. The transformation probably underwent nucleophilic addition/6π electrocyclization/oxidative aromatization and the elimination
Palladium-catalysed cross-coupling reactions of arylboronic acids with π-deficient heteroaryl chlorides
作者:Naji M. Ali、Alexander McKillop、Michael B. Mitchell、Ricardo A. Rebelo、Philip J. Wallbank
DOI:10.1016/s0040-4020(01)80481-6
日期:1992.1
The palladium-catalysed cross-coupling reactions of arylboronic acids with a variety of pi-deficient heteroaryl chlorides proceed in high yield. [1,4-Bis(diphenylphosphino)butane]palladium(II) dichloride was found to be a very satisfactory catalyst for monocyclic heteroaryl chlorides, whereas tetrakis(triphenylphosphine)palladium(O) was found to be excellent for a range of chloroquinoline derivatives.
A New Synthesis of 4-Phenylquinolines by Reaction of 2-(a-Bromobenzyl)oxiranes with Aniline Derivatives
作者:Michinori Karikomi、Hiroshi Tsukada、Takashi Toda
DOI:10.3987/com-01-9234
日期:——
Several 4-phenylquinoline derivatives were synthesized by reaction of (2R*,1 'R*)-2-(alpha -bromobenzyl)oxiranes (1a) with aniline derivatives, and the following treatment of the formed 3-hydroxy-4-phenyl-1,2,3,4-tetrahydroquinolines (2) with the Rydon reagent, and potassium t-butoxide and air oxidation.