A cascadesynthesis of quinazolinones from 2-aminobenzonitriles and aryl bromides through a palladium-catalyzedcarbonylation reaction has been developed. Various quinazolinones were produced in moderate to excellent yields. The reactions go through aminocarbonylation of aryl bromides–hydration of nitriles–cyclization sequence. Notably, all the products were isolated by recrystallization.
A Novel One‐Pot Synthesis of 2‐Aryl‐4(3<i>H</i>)‐Quinazolinones Using Room Temperature Ionic Liquid as Reaction Medium as well as Promoter
作者:T. M. Potewar、R. N. Nadaf、Thomas Daniel、R. J. Lahoti、K. V. Srinivasan
DOI:10.1081/scc-200048433
日期:2005.1
Abstract An efficientone‐potsynthesis of 2‐aryl‐4(3H)‐quinazolinones from 2‐amino benzamides and substituted benzoyl chlorides in a room temperature ionicliquid is described. Compared with the classical reaction conditions, this new synthetic method has the advantages of recyclability of ionicliquid, very good to excellent yields (78–92%), the absence of hazardous and expensive catalysts, and easy
Site‐Selective C–H Amidation of 2‐Aryl Quinazolinones Using Nitrene Surrogates
作者:Saegun Kim、Daeun Jeoung、Kunyoung Kim、Seok Beom Lee、Suk Hun Lee、Min Seo Park、Prithwish Ghosh、Neeraj Kumar Mishra、Suckchang Hong、In Su Kim
DOI:10.1002/ejoc.202001128
日期:2020.12.13
The site‐selectiveC–Hamidation of 2‐aryl quinazolin‐4(3H)‐ones with dioxazolones under rhodium(III) catalysis is described. Gram‐scale reaction, late‐stage C–H functionalization, and synthetic transformations highlight the potential of the developed method.
Ru(<scp>ii</scp>)-Catalyzed C–H addition and oxidative cyclization of 2-aryl quinazolinones with activated aldehydes
作者:Jin Ho Choi、Kunyoung Kim、Harin Oh、Sangil Han、Neeraj Kumar Mishra、In Su Kim
DOI:10.1039/d0ob01663b
日期:——
The ruthenium(II)-catalyzed cross-coupling reaction between 2-aryl quinazolinones and activated aldehydes is described. This method enables the site-selective hydroxyalkylation under redox-neutral conditions. Moreover, this protocol provides a facile access to various tetracyclic isoindoloquinazolinones by using Cu(OAc)2 as an external oxidant via C–H addition and subsequent intramolecular cyclization
描述了钌( II )催化的2-芳基喹唑啉酮与活化醛之间的交叉偶联反应。该方法能够在氧化还原中性条件下进行位点选择性羟烷基化。此外,该协议通过使用 Cu(OAc) 2作为外部氧化剂,通过C-H 添加和随后的分子内环化,提供了对各种四环异吲哚并喹唑啉酮的便捷访问。观察到广泛的底物范围和高水平的化学选择性以及广泛的官能团耐受性。