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
Pd-Catalyzed Regioselective Mono-Arylation: Quinazolinone as the Inherent Directing Group for C(sp<sup>2</sup>)–H Activation
作者:Dnyaneshwar N. Garad、Amol B. Viveki、Santosh B. Mhaske
DOI:10.1021/acs.joc.7b00948
日期:2017.6.16
The Pd-catalyzed quinazolinone-directed regioselective monoarylation of aromatic rings by C–H bond activation is developed. A broad substrate scope is demonstrated for both quinazolinone as well as diaryliodonium triflates. The use of a base was found to be crucial for this transformation, unlike for the known nitrogen-directed arylations. All of the novel quinazolinones of biological interest were
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。
The regioselective coupling of 2-arylquinazolinone C–H with aldehydes and benzyl alcohols under oxidative conditions
作者:Umesh A. Kshirsagar、Deepali S. Waghmare、Shrikant D. Tambe
DOI:10.1039/d0nj03721d
日期:——
The direct and regioselective palladium-catalyzed dehydrogenative coupling of aldehydes and benzyl alcohols with 2-aryl-quinazolinone C–H endowed with a quinazolinone nucleus, which is one of the most fascinating and vital core units, as an inherent directing group under oxidative conditions was developed. This atom/step economic aroylation offers an attractive handle and a very green approach for