Application of <i>N</i>,<i>N</i>-Dimethylethanolamine as a One-Carbon Synthon for the Synthesis of Pyrrolo[1,2-<i>a</i>]quinoxalines, Quinazolin-4-ones, and Benzo[4,5]imidazoquinazolines <i>via</i> [5 + 1] Annulation
作者:Meiqi Geng、Minzhao Huang、Jinqiang Kuang、Weiwei Fang、MaoZhong Miao、Yongmin Ma
DOI:10.1021/acs.joc.2c02079
日期:2022.11.4
synthetic chemistry. In this report, a Cu(II)-catalyzed green and efficient synthesis of pyrrolo[1,2-a]quinoxaline, quinazolin-4-one, and benzo[4,5]imidazoquinazoline derivatives was developed, employing N,N-dimethylethanolamine (DMEA) as a C1 synthon. Green oxidant O2 is critical in these transformations, facilitating the formation of a key intermediate─a reactive iminium ion. The method conducted
N-杂环的合成是合成化学的重要组成部分。在本报告中,采用N,N-二甲基乙醇胺开发了 Cu(II) 催化绿色高效合成吡咯并[1,2 - a ]喹喔啉、喹唑啉-4-酮和苯并[4,5]咪唑并喹唑啉衍生物(DMEA) 作为 C1 合成子。绿色氧化剂 O 2在这些转化过程中至关重要,它促进了关键中间体的形成——活性亚胺离子。在温和条件下进行的方法与多种功能组兼容,为以前开发的协议提供了一个有吸引力的替代方案。