Alkylation of quinoxalin-2(1<i>H</i>)-ones using phosphonium ylides as alkylating reagents
作者:Sha Peng、Jun-Jia Liu、Luo Yang
DOI:10.1039/d1ob01858b
日期:——
through base promoted direct alkylation of quinoxalin-2(1H)-ones with phosphonium ylides as alkylating reagents under metal- and oxidant-free conditions was developed. Various 3-alkylquinoxalin-2(1H)-ones were easily obtained in good to excellent yields. Tentative mechanistic studies suggest that this reaction is likely to involve a nucleophilic addition–elimination process.
开发了一种实用且有效的方法,用于通过碱促进 quinoxalin-2(1 H )-ones 在无金属和无氧化剂条件下作为烷基化试剂直接烷基化 quinoxalin-2(1 H )-ones。各种 3-烷基喹喔啉-2(1 H )-酮很容易以良好至优异的产率获得。初步的机理研究表明,该反应可能涉及亲核加成 - 消除过程。
Metal-free alkylation of quinoxalinones with aryl alkyl ketones
The first metal-free method for alkylation of quinoxalinones using cheap and stable aryl alkyl ketones as nucleophilic alkylation reagents is reported. This strategy greatly broadens the application channels of aryl alkyl ketones through carbon–carbon bond activation. In addition, the protocol has the advantages of simple operation, broad substrate scope, and good functional group tolerance.
Metal-free regioselective formation of C–N and C–O bonds with the utilization of diaryliodonium salts in water: facile synthesis of N-arylquinolones and aryloxyquinolines
作者:Manish Kumar Mehra、Mukund P. Tantak、V. Arun、Indresh Kumar、Dalip Kumar
DOI:10.1039/c7ob00940b
日期:——
N-arylquinolones and aryloxyquinolines has been accomplished by employing easily accessible diaryliodoniumsalts and quinolones in water under metal- and ligand-free conditions. This operationally simple strategy is significant due to mild reaction conditions, high product yields, recyclability of released iodoarenes and scalability to the gram level. The practical utility of the developed protocol was
通过在水中在无金属和无配体的条件下使用容易获得的二芳基碘鎓盐和喹诺酮,可以实现导致N-芳基喹诺酮和芳氧基喹啉的关键C–N和C–O键的区域选择性构建。由于温和的反应条件,较高的产物收率,释放的碘代芳烃的可回收性以及可扩展至克级,这种操作简单的策略非常重要。通过医学上重要的杂环如acridin-9(10 H)-one,3-methylquinoxalin-2(1 H)-one和1 H -benzo [ d ] imidazol-2( 3 H)-一。
Iron-catalyzed methylation of quinoxalin-2(1H)-ones with dimethyl sulfoxide under visible light irradiation
作者:Hong He、Zhongyi Zhang、Yicheng Zhang、Chao Zhou、Jie Liu、Lei Wang
DOI:10.1016/j.mcat.2024.113999
日期:2024.4
The synthesis of iron-catalyzed -methylation of quinoxalin-2(1)-ones using dimethyl sulfoxide as the methylating reagent is described herein. The cross-coupling reactions proceeded smoothly under visible-light irradiation, which generated the corresponding products in moderate to good yields. Further investigation on the application of the methylation reaction using readily available DMSO as the methylation