Synthesis of 2,3-dihydroquinazolinones and quinazolin-4(3H)-ones catalyzed by graphene oxide nanosheets in an aqueous medium: “on-water” synthesis accompanied by carbocatalysis and selective C–C bond cleavage
作者:Nazia Kausar、Indranil Roy、Dipankar Chattopadhyay、Asish R. Das
DOI:10.1039/c6ra00388e
日期:——
Graphene oxide (GO) nanosheet catalyzed new and straightforward strategies for the construction of 2,3-dihydroquinazolinones and quinazolin-4(3H)-ones starting from anthranilamide (2-aminobenzamide) and an aldehyde/ketone in aqueous medium at room temperature have been realized. This catalyst is also found to be efficient for the expedient construction of quinazolin-4(3H)-ones starting from anthranilamide
Application of the ultrasound in the mild synthesis of substituted 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heterogeneous metal–MWCNTs nanocomposites
作者:Javad Safari、Soheila Gandomi-Ravandi
DOI:10.1016/j.molstruc.2014.05.002
日期:2014.8
Abstract A practical method were applied successfully to synthesize mono- and disubstituted dihydroquinazolinones through three-component condensation of isatoic anhydride, primary amines or ammonium acetate with aromatic aldehydes in the presence of some transition metals–multi-walled carbon nanotubes under sonication. Also, metals supported on MWCNTs showed excellent catalytic performance for above-mentioned
Synthesis of 2-Arylquinazolin-4(3<i>H</i>)-one Derivatives Catalyzed by Iodine in [bmim<sup>+</sup>][ ]
作者:Xiang-Shan Wang、Ke Yang、Mei-Mei Zhang、Chang-Sheng Yao
DOI:10.1080/00397910903318609
日期:2010.8.5
Controlling selectivity of the reactions of aromatic aldehydes and 2-aminobenzamide in ionicliquidcatalyzed by iodine at either room temperature or at 80 °C under nitrogen resulted in the synthesis of (E)-Schiff bases, 2,3-dihydro-2-arylquinazolin-4(1H)-one and 2-arylquinazolin-4(3H)-onederivatives, in excellent yields.
在室温或 80 °C 氮气氛下,控制芳香醛和 2-氨基苯甲酰胺在碘催化的离子液体中反应的选择性导致合成(E)-席夫碱、2,3-二氢-2-芳基喹唑啉-4(1H)-one 和 2-芳基喹唑啉-4(3H)-one 衍生物,产率极好。
Pentafluorophenylammonium triflate as a suitable and effective metal-free catalyst for the synthesis of quinazoline derivatives via one-pot multicomponent method
作者:Samad Khaksar、Milad Gholami
DOI:10.1007/s11164-013-1483-7
日期:2015.6
A simple and facile synthesis of highly functionalized quinazoline derivatives has been successfully developed by treatment of aldehydes, ammonium acetate, and 2-aminoaryl ketones or isatoic anhydride under reflux conditions in the presence of a pentafluorophenylammonium triflate (PFPAT) organocatalyst. These catalytic condensation reactions represent green chemical processes, while the PFPAT organocatalyst is air-stable, cost-effective, easy to handle, and easily removed from the reaction mixtures.
An efficientone-potsynthesis of 2,3-dihydroquinazoline-4(1H)-one derivatives 4a–l is described using SBA-Pr-SO3H as a heterogeneous acid catalyst. The present methodology resulted in various derivatives of 2,3-dihydroquinazoline-4(1H)-one in good yield via a three-component reaction of isatoic anhydride, aldehydes and ammonium acetate. SBA-Pr-SO3H played a significant role as an efficient mesoporous