Modular Synthesis of Tetrasubstituted Pyrroles through a Four-Component Cyclization Strategy Using Ammonium Salt as the Nitrogen Source
作者:Chunlan Zhou、Haolin Zheng、Ya Chen、Guojiang Mao、Guo-Jun Deng
DOI:10.1021/acs.joc.2c02556
日期:2023.2.3
A four-component synthesis of tetrasubstituted pyrroles was developed under metal-free conditions. The pyrrole ring was formed in one pot through [2 + 1 + 1 + 1] condensation using ammonium salt as the nitrogen source. In this strategy, 1,4-naphthoquinones and maleimides were used as the versatile C2 fragments to provide substituted benzo[f]isoindole-4,9-diones and pyrrolo[3,4-c]pyrrole-1,3-diones
在无金属条件下开发了四取代吡咯的四组分合成。以铵盐为氮源,通过[2+1+1+1]缩合一锅法形成吡咯环。在此策略中,1,4-萘醌和马来酰亚胺被用作通用的 C2 片段,分别提供取代的苯并 [ f ] 异吲哚-4,9-二酮和吡咯并 [3,4- c ] 吡咯-1,3-二酮. 这项工作的重点是使用铵盐作为氮源、现成的起始材料和在一次操作中形成多键(两个 C-C 和两个 C-N 键)。