Hydrogen peroxide-mediated synthesis of 2,4-substituted quinazolines <i>via</i> one-pot three-component reactions under metal-free conditions
作者:Khang H. Trinh、Khang X. Nguyen、Phuc H. Pham、Tung T. Nguyen、Anh N. Q. Phan、Nam T. S. Phan
DOI:10.1039/d0ra05040g
日期:——
An efficient metal-free synthesis of 2,4-substituted quinazolines via a hydrogen peroxide-mediated one-pot three-component reaction of 2-aminoaryl ketones, aldehydes, and ammonium acetate has been developed. The transformation proceeded readily under mild conditions in the presence of commercially available hydrogen peroxide. The significant advantages of this approach are (1) the readily available
activators. 3 Very re- cently Wang et al., reported an elegant synthesis of 2-phe- nylquinazolines employing molecular iodine/TBHP and also with supported copper oxide nanoparticles. 4 Truong et al. described copper-catalyzed Ullmann N-arylation coupling process to synthesize 2-phenylquinazolines from the corresponding o-iodobenzaldehydes and benzamidine hydrochloride under ligand-free conditions. 5 However
A novel and efficient protocol for the synthesis of 2-phenyl quinazolinederivatives is developed by recyclable graphite oxide as a catalyst, devoid of moisture sensitive metal catalysts and corrosive acidic reagents. This new procedure has afforded the desired products in good to excellent yields. The graphite oxide can be synthesized by a simple adoptable procedure from inexpensive and readily available
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