Quinazoline-directed selective ortho-iodination for the synthesis of 2-(2-iodoaryl)-4-arylquinazolines
摘要:
Palladium-catalyzed ortho-iodination of 2, 4-diarylquinazolines via C-H activation is described. These palladium catalytic quinazoline-directed mono-iodination reactions are very efficient, highly selective and with a broad substrate scope, producing the corresponding 2-(2-iodoaryl)-4-arylquinazolines with good yields. (C) 2017 Published by Elsevier B.V.
Transition Metal-Free Visible Light-Driven Photoredox Oxidative Annulation of Arylamidines
摘要:
A fast catalytic synthesis of multisubstituted quinazolines from readily available amidines via visible light-mediated oxidative C(sp(3))-C(sp(2)) bond formation has been established. This reaction is a metal-free oxidative coupling catalyzed by a photoredox organocatalyst. The protocol features low catalyst loading (1 mol %).
The first example of the palladium-catalyzed, three-component tandem reaction of 2-aminobenzonitriles, aldehydes, and arylboronic acids has been developed, providing a new approach for one-pot assembly of diverse quinazolines in moderate to good yields. A noteworthy feature of this method is the tolerance of bromo and iodo groups, which affords versatility for further synthetic manipulations. Preliminary
The first Pd/C‐catalyzedoxidative C(sp3)−H bond amination of o‐nitroacetophenones with benzylamines or amino acids proceeding through C−N bond cleavage followed by C−N bond formation by a hydrogen‐transfer strategy was developed. These transformations proceeded smoothly in water to afford the desired quinazolines in moderate to good yields. This protocol has a broad substrate scope and good tolerance
Visible-Light-Induced Benzylic C-H Functionalization for the Synthesis of 2-Arylquinazolines
作者:Jingchang Zhang、Qibao Wang、Yongen Guo、Lin Ding、Maocai Yan、Yinglin Gu、Jiajia Shi
DOI:10.1002/ejoc.201900996
日期:2019.9.15
Visible‐light‐induced synthesis of substituted quinazolines using1‐(2‐aminoaryl)ethan‐1‐ones in conjunction with arylmethanamines as starting materials.
Copper-catalyzed aerobic oxidative decarboxylative amination of arylacetic acids: a facile access to 2-arylquinazolines
作者:Yizhe Yan、Miaomiao Shi、Bin Niu、Xiangping Meng、Changrui Zhu、Gengyao Liu、Ting Chen、Yanqi Liu
DOI:10.1039/c6ra04195g
日期:——
An efficient copper-catalyzed oxidative decarboxylative amination of arylacetic acids with 2-aminobenzoketones and ammonium acetate under oxygen atmosphere was first developed. This reaction represents a novel avenue for 2-arylquinazolines in good...