Relationships Between the Chemical Structure of Substances and Their Antimycobacterial Activity Against Atypical Strains. Part 18. 3-Phenyl-2H-1,3-benzoxazine-2,4(3H)-diones and Isosteric 3-Phenylquinazoline-2,4(1H,3H)-diones
Green Synthesis of Quinazolinone Derivatives Catalyzed by Iodine in Ionic Liquid
作者:Shu-Liang Wang、Ke Yang、Chang-Sheng Yao、Xiang-Shan Wang
DOI:10.1080/00397911.2010.524340
日期:2012.2.1
Abstract A series of quinazolinone derivatives were synthesized by the reaction of 2-aminobenzamides and triethyl orthoformate or triphosgene in ionicliquid of [BMIm]BF4 at 80 °C catalyzed by iodine in good yields. Compared to other methods, this new procedure has the advantages of mild reaction conditions, good yields, operational simplicity, and environmentally friendly procedure. GRAPHICAL ABSTRACT
Oxidative Rearrangement of Isatins with Arylamines Using H<sub>2</sub>
O<sub>2</sub>
as Oxidant: A Facile Synthesis of Quinazoline-2,4-diones and Evaluation of Their Antibacterial Activity
A green and highly efficient synthetic method for the synthesis of quinazoline‐2,4‐diones with hydrogen peroxide as the terminal oxidant has been developed. The reaction features the mild reaction conditions, broad substrate scope, metal‐free catalysts, and sole byproduct water. A plausible mechanism for this process was proposed. Moreover, an antibacterial activity study was performed to evaluate
A compound selected from those of formula (I):
1
wherein
A, B, D, X, R
1
, R
2
, m and n are as defined in the description, their diastereoisomers and addition salts thereof with a pharmaceutically acceptable acid or base.
Metal-Free N–H/C–H Carbonylation by Phenyl Isocyanate: Divergent Synthesis of Six-Membered <i>N</i>-Heterocycles
作者:Karthick Govindan、Alageswaran Jayaram、Tamilselvan Duraisamy、Nian-Qi Chen、Wei-Yu Lin
DOI:10.1021/acs.joc.2c01026
日期:2022.7.1
We disclose a method using phenyl isocyanate to synthesize carbonyl-containing N-heterocycles. The metal-free novel approach for both N–H and C–H carbonylation processes was successfully refined, delivering a range of synthetically valuable derivatives of quinazoline-2,4(1H,3H)-dione, 2H-benzo[e] [1,2,4] thiadiazin-3(4H)-one 1,1-dioxide, and pyrrolo[1,2-a] quinoxalin-4(5H)-one. The protocol features
我们公开了一种使用异氰酸苯酯合成含羰基的N-杂环化合物的方法。N-H 和 C-H 羰基化过程的无金属新方法已成功精炼,提供了一系列具有合成价值的喹唑啉-2,4(1 H ,3 H )-二酮、2 H-苯并[ e ] [1,2,4] thiadiazin-3(4 H )-one 1,1-dioxide 和 pyrrolo[1,2 - a ] quinoxalin-4(5 H)-一。该协议具有广泛的底物,具有多种反应,适用于优异的产量、温和的条件和良好的官能团兼容性。此外,该反应的适用性以克级合成和药物分子的合成转化为特征。
Synthesis of <i>N</i>-Unsubstituted and <i>N</i>3-Substituted Quinazoline-2,4(1<i>H</i>,3<i>H</i>)-diones from <i>o</i>-Aminobenzamides and CO<sub>2</sub> at Atmospheric Pressure and Room Temperature
作者:Lin Zhang、Qian Chen、Linlin Li、Nana Ma、Jie Tian、Hao Sun、Qian Xu、Yuanyong Yang、Chun Li
DOI:10.1021/acs.orglett.3c00614
日期:2023.4.14
The unprecedented metal-free synthesis of both N-unsubstituted and N3-substituted quinazoline-2,4(1H,3H)-diones from o-aminobenzamides and CO2 under atmospheric pressure at room temperature is developed. This protocol easily allows for variations of functional groups (including alkyl, aryl, and heterocycle groups) at the N3-position to accommodate the construction of many important drugs and bioactive
开发了在大气压和室温下从邻氨基苯甲酰胺和 CO 2空前无金属合成N-未取代和N 3-取代喹唑啉-2,4(1 H ,3 H ) -二酮的方法。该协议很容易允许N 3 位的官能团(包括烷基、芳基和杂环基团)发生变化,以适应许多重要药物和生物活性化合物的构建。该反应具有生态友好、底物范围耐受性和多功能性的特点,甚至可以在克级实施。