commercially available and cheap carboxylicacids as alkylating reagents, a practical methodology for the visible-light induced decarboxylative alkylation of quinoxalin-2(1H)-ones was developed. The reaction proceeds in the absence of metal-catalyst, acid or basic additive, or external photosensitizer, making it an environmentally friendly and attractive protocol for the alkylation of quinoxalines.
使用市售廉价的羧酸作为烷基化试剂,开发了一种实用的方法,用于可见光诱导的 quinoxalin-2(1 H )-ones 的脱羧烷基化。该反应在没有金属催化剂、酸或碱添加剂或外部光敏剂的情况下进行,使其成为一种环境友好且有吸引力的喹喔啉烷基化方案。
Electro-oxidative C–H alkylation of quinoxalin-2(1<i>H</i>)-ones with organoboron compounds
作者:Kaikai Niu、Yanke Hao、Lingyun Song、Yuxiu Liu、Qingmin Wang
DOI:10.1039/d0gc03892j
日期:——
Radical cleavage of C–B bonds to accomplish C–H functionalization is synthetically appealing but practically challenging. We report herein a mild electro-oxidative method for efficient C–H alkylation of quinoxalin-2(1H)-ones by means of radical addition reactions of alkyl boronic acids and esters and alkyl trifluoroborates to afford C–C coupled products.
The visible-light-triggered regioselective alkylation of quinoxalin-2(1<i>H</i>)-ones <i>via</i> decarboxylation coupling
作者:Hongdou Zhang、Jun Xu、Min Zhou、Jianming Zhao、Pengfei Zhang、Wanmei Li
DOI:10.1039/c9ob02203a
日期:——
An efficient protocol to synthesize 3-alkylated quinoxalin-2(1H)-ones through photocatalytic decarboxylation coupling reactions of quinoxalin-2(1H)-ones with N-hydroxyphthalimide ester was developed.
Molecular oxygen-mediated selective hydroxyalkylation and alkylation of quinoxalin-2(1H)-ones with alkylboronic acids
作者:Hongdou Zhang、Jun Xu、Yani Ouyang、Xiaoguang Yue、Chenxin Zhou、Zhigang Ni、Wanmei Li
DOI:10.1016/j.cclet.2021.09.069
日期:2022.4
oxygen-mediated method for the selective hydroxyalkylation and alkylation of quinoxalin-2(1H)-ones with alkylboronic acids under transition-metal free conditions has been developed. This strategy demonstrates a broad scope of quinoxalin-2(1H)-ones and alkylboronic acids, giving 3-hydroxyalkylquinoxalin-2(1H)-ones and 3-alkylquinoxalin-2(1H)-ones in moderate-to-good yield. Control experiments reveal that
在此,开发了一种有效的分子氧介导的方法,用于在无过渡金属条件下用烷基硼酸选择性羟烷基化和烷基化 quinoxalin-2(1 H )-ones。该策略展示了广泛的 quinoxalin-2(1 H )-ones 和烷基硼酸,使 3-hydroxyalkylquinoxalin-2(1 H )-ones 和 3-alkylquinoxalin-2(1 H )-ones 处于中等至良好的屈服。对照实验表明涉及一种激进的途径。
Organophotoredox and Hydrogen Atom Transfer Cocatalyzed C–H Alkylation of Quinoxalin-2(1<i>H</i>)-ones with Aldehydes, Amides, Alcohols, Ethers, or Cycloalkanes
作者:Liling Wang、Zhaoxing Chen、Guohua Fan、Xiaozu Liu、Peijun Liu
DOI:10.1021/acs.joc.2c01967
日期:2022.11.4
with hydrogen atom transfer to enable C–H alkylation of quinoxalin-2(1H)-ones with feedstock aldehydes, amides, alcohols, ethers, or cycloalkanes. This reaction occurred under environmentally benign and external oxidant-free reaction conditions, providing a general and sustainable access to various C3-alkylated quinoxalinone derivatives with broad substituent diversity and good functional group compatibility
描述了一种温和的方法,将有机光氧化还原催化与氢原子转移相结合,使 quioxalin-2(1 H )-ones 与原料醛、酰胺、醇、醚或环烷烃发生 C–H 烷基化。该反应发生在环境友好且无外部氧化剂的反应条件下,为获得具有广泛取代基多样性和良好官能团相容性的各种 C3-烷基化喹喔啉酮衍生物提供了普遍和可持续的途径。