the synthesis of quinazolinones, quinoxalinones, benzooxazinones, and benzothiazoles from the reactions of α-keto acids with 2-aminobenzamides, benzene-1,2-diamines, 2-aminophenols, and 2-aminobenzenethiols, respectively, is described. The reactions were conducted under catalyst-free conditions, using water as the sole solvent with no additive required, and successfully applied to the synthesis of sildenafil
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
KO<sup>t</sup>Bu-BF<sub>3</sub>.OEt<sub>2</sub> mediated synthesis of quinazolin-4(<i>3H</i>)-ones from 2-substituted amides with nitriles and aldehydes
作者:Vishnuvardhan Nomula、Sadu Nageswara Rao
DOI:10.1080/00397911.2021.1928218
日期:2021.9.2
Abstract KOtBu-BF3.OEt2 mediated synthesis of quinazolin-4(3H)-ones from 2-substituted amides with nitriles and aldehydes have been developed. In this protocol, a variety of nitriles as well as aldehydes react with 2-substituted benzamides to corresponding quinazolin-4(3H)-ones products in good to moderate yields, via the cleavage of C-X and C-N bonds and the formation of double C-N bonds simultaneously
摘要 已经开发了 KO t Bu-BF 3 .OEt 2介导的从 2-取代酰胺与腈和醛合成喹唑啉-4( 3H )-酮。在该协议中,通过 CX 和 CN 键的断裂和双 CN 键的形成,各种腈和醛与 2-取代苯甲酰胺反应生成相应的喹唑啉-4(3H)-ones 产品,产率良好至中等同时,在叔丁醇钾的存在下。
An efficient transition-metal-free route to quinazolin-4(3<i>H</i>)-ones <i>via</i> 2-aminobenzamides and thiols