One-Pot Synthesis of Quinazolin-4(3<i>H</i>)-ones through Anodic Oxidation and the Related Mechanistic Studies
作者:Liu Cao、Hengrui Huo、Haipeng Zeng、Yu Yu、Dengfu Lu、Yuefa Gong
DOI:10.1002/adsc.201800927
日期:2018.12.21
A metal‐free and oxidant‐free method for the one‐pot preparation of quinazolin‐4(3H)‐ones enabled by electrochemical oxidation is described. Together with 2‐aminobenzamides, a variety of aldehydes were successfully applied to an acid‐catalyzed annulation and direct anodic oxidation cascade, affording structurally diverse quinazoline‐4(3H)‐ones in good to excellent yields. Additionally, certain alcohols
Palladium-Catalyzed Oxidative Three-Component Coupling of Anthranilamides with Isocyanides and Arylboronic Acids: Access to 2,3-Disubstituted Quinazolinones
作者:Chun Qian、Kui Liu、Shou-Wei Tao、Fang-Ling Zhang、Yong-Ming Zhu、Shi-Lin Yang
DOI:10.1021/acs.joc.8b01218
日期:2018.8.17
A novel palladium-catalyzedoxidative three-component coupling of easily accessible N-substituted anthranilamides with isocyanides and arylboronicacids is achieved. This protocol offers an alternative approach toward 2,3-disubstituted quinazolinones with a wide substrate scope and good functional group tolerance.
Synthesis of 2-aryl quinazolinones <i>via</i> iron-catalyzed cross-dehydrogenative coupling (CDC) between N–H and C–H bonds
作者:Yoonkyung Jang、Seok Beom Lee、Junhwa Hong、Simin Chun、Jeeyeon Lee、Suckchang Hong
DOI:10.1039/d0ob00866d
日期:——
describe the direct synthesis of quinazolinones via cross-dehydrogenative coupling between methylarenes and anthranilamides. The C–H functionalization of the benzylic sp3 carbon is achieved by di-t-butyl peroxide under air, and the subsequent amination–aerobic oxidation process completes the annulation process. Iron catalyzed the whole reaction process and various kinds of functional groups were tolerated
REINVESTIGATION OF THE SYNTHESIS OF 2-BENZYL-3-ARYL-QUINAZOLIN-4-[3<i>H</i>]-ONES. AN IMPROVED MULTI-COMPONENT PROCEDURE USING MICROWAVES
作者:Anshu Dandia、Ruby Singh、Pritima Sarawgi
DOI:10.1080/00304940509354972
日期:2005.8
antifungal a c t i ~ i t y . ~ J ~ An earlier reported conventional synthesis of 2,3-disubstituted quinazolin-4(3H)-ones (4) involves two steps,' I cyclodehydration of 2-benzamidobenzoic acid (1) with excess acetic anhydride under anhydrous conditions to give benzoxazin-4-one (2) followed by reflux of 2 with amines in glacial acetic acid or pyridine.12 The products were obtained in moderate yields and
One-pot solvent-free synthesis of 2, 3- disubstituted 4(3H)- quinazolinones catalyzed by long-chain double SO3H-functionalized Brønsted acidic ionic liquids under microwave irradiation
作者:Xinzhong Li、Qi Lin、Lefu Wang
DOI:10.1007/s13738-014-0553-0
日期:2015.5
for synthesis of 2, 3-disubstituted 4(3H)-quinazolinones by condensation of anthranilic acid with acyl chlorides and aromatic/aliphatic amines using two long chain double SO3H-functionalized acdic ionicliquids as catalyst under microwave irradiation was reported. Under optimized conditions, the reactions completed within 4–8 min and gave the target compounds in the yields of 76–94 %. Two ionic liquids