Synthesis of Dihydroquinoxalinones from Biomass-Derived Keto Acids and <i>o</i>-Phenylenediamines
作者:Wenfeng Zhao、Hu Li、Qingmei Ge、Hang Cong、Song Yang
DOI:10.1021/acs.joc.3c02821
日期:2024.3.15
A novel catalyst-free cascade amination/cyclization/reduction reaction was developed for the synthesis of various Dihydroquinoxalinones under mild conditions from accessible biomass-derived keto acids and 1,2-phenylenediamines with ammonia borane as a hydrogen donor. This single-step approach enables a simple and eco-friendly route toward the direct synthesis of 12 kinds of Dihydroquinoxalinones in
开发了一种新型无催化剂级联胺化/环化/还原反应,用于在温和条件下,以氨硼烷作为氢供体,从可获取的生物质衍生的酮酸和1,2-苯二胺合成各种二氢喹喔啉酮。这种单步方法提供了一种简单且环保的路线,可以在绿色溶剂碳酸二甲酯中以中等至优异的产率直接合成 12 种二氢喹喔啉酮。氘标记实验和密度函数计算的结果表明还原过程沿着双氢转移途径进行。在克级实验中可以得到可接受的二氢喹喔啉酮收率,说明了所报道的反应系统的实用性。