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
Ecofriendly and Efficient One-Pot Procedure for the Synthesis of Quinazoline Derivatives Catalyzed by an Acidic Ionic Liquid Under Aerobic Oxidation Conditions
three-component condensation reaction between 2-aminobenzophenone derivatives, formaldehyde or aromatic aldehydes, and ammonium acetate efficiently provides substituted quinazolines in a one-pot reaction in the presence of Brönsted acidic ionic liquid, 1-methylimidazolium triflouroacetate ([Hmim]TFA), in conjunction with aerobic oxidation. The ionic liquid was separated from the reaction mixture by simple
Catalyst-free synthesis of quinazoline derivatives using low melting sugar–urea–salt mixture as a solvent
作者:Zhan-Hui Zhang、Xiao-Nan Zhang、Li-Ping Mo、Yong-Xiao Li、Fei-Ping Ma
DOI:10.1039/c2gc35258c
日期:——
of maltose–dimethylurea (DMU)–NH4Cl was found to be an inexpensive, non-toxic, easily biodegradable and effective reaction medium in the catalyst-freesynthesis of quinazolinederivatives. This simple and efficient method furnished the corresponding quinazolines in high yields via one-pot three-component reaction of 2-aminoaryl ketones, aldehyde, and ammonium acetate under aerobic oxidation conditions
TMSOTf-catalyzed synthesis of substituted quinazolines using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions
作者:Chieh-Kai Chan、Chien-Yu Lai、Cheng-Chung Wang
DOI:10.1039/d0ob01507e
日期:——
we report an efficient and mild synthetic route for the construction of substituted quinazolines from functionalized 2-aminobenzophenones with various benzaldehydes using cat. TMSOTf and hexamethyldisilazane (HMDS) under neat, metal-free and microwave irradiation conditions in which gaseous ammonia was formed in situ. This synthetic protocol provided the desired quinazolines with a broad substrate scope
在本文中,我们报道了一种高效且温和的合成路线,用于使用cat由官能化的 2-氨基二苯甲酮与各种苯甲醛构建取代的喹唑啉。TMSOTf 和六甲基二硅氮烷 (HMDS) 在纯净、无金属和微波辐照条件下原位形成气态氨。这种合成方案提供了所需的喹唑啉,其底物范围广泛,产率良好。通过 X 射线单晶衍射分析证实了一些结构。
Iron‐Based Imidazolium Salt as Dual Lewis Acid and Redox Catalyst for the Aerobic Synthesis of Quinazolines
作者:Mario Martos、Isidro M. Pastor
DOI:10.1002/ejoc.202200839
日期:2022.9.27
An efficient and sustainable protocol for the preparation of quinazolines by means of a condensation-cyclization-oxidation reaction sequence promoted by an iron-imidazolium catalyst has been developed and fully assessed in terms of environmental impact.