AbstractA novel potassium iodide‐catalyzed three‐component synthesis of quinazolines via benzylic CH bonds amination was developed. Commonly used ammonia salt and the sp3 carbon in commercially available methylarenes were used as nitrogen and C1 sources, respectively. Mechanistic studies indicated that an aryl aldehyde is involved as a key intermediate in the reaction.magnified image
Microwave-Promoted Syntheses of Quinazolines and Dihydroquinazolines from 2-Aminoarylalkanone <i>O</i>-Phenyl Oximes
作者:Fernando Portela-Cubillo、Jackie S. Scott、John C. Walton
DOI:10.1021/jo900629g
日期:2009.7.17
was included in the reaction mixture, fully aromatic quinazolines were produced in high yields by a rapid and convenient process. The method worked well with alkyl, aryl, and heterocyclic aldehydes and for a variety of substituents in the benzenic part of the molecule. Similar reactions employing ketones instead of aldehydes were less efficient. Although some dihydroquinazolines did form, they were accompanied
2-(Aminoaryl)alkanone O-phenyl oximes: versatile reagents for syntheses of quinazolines
作者:Fernando Portela-Cubillo、Jackie S. Scott、John C. Walton
DOI:10.1039/b803630f
日期:——
Microwave irradiations of 2-(aminoaryl)alkanone O-phenyl oximes and carbonyl compounds generate iminyl radicals in company with imines; iminyl on imine ring closure yields dihydroquinazolines or quinazolines when ZnCl2 is included in the mixture.
Photocatalytic synthesis of 2,4‐substituted quinazolines via a one‐pot, three‐component reaction under catalyst‐free conditions
作者:Zongbo Xie、Xuehua Chen、Guofang Jiang、Qianwen Fan、Hong Yang、Zhanggao Le
DOI:10.1002/jhet.4810
日期:2024.6
A novel, catalyst-free photoinduced synthesis of 2,4-substituted quinazoline using 2-amino-aryl ketone, an aldehyde, and ammonium acetate was developed. A series of 2,4-substituted quinazoline compounds were obtained via irradiating the reactants with a light-emitting diode light (18 W) at roomtemperature. The broad substrate range and excellent gram-scale experimental results demonstrate the versatility