Bromine-Promoted One-Pot Furo[<i>b</i>]annulation and α-C(sp<sup>2</sup>)-Thiomethylation Cascade of (<i>E</i>)-3-Styrylquinoxalin-2(1<i>H</i>)-ones with Dimethyl Sulfoxide
作者:Vakhid A. Mamedov、Nataliya E. Algaeva、Victor V. Syakaev、Liliya V. Mustakimova、Elena A. Khafizova、Leisan R. Shamsutdinova、Ildar’ Kh. Rizvanov、Aidar T. Gubaidullin
DOI:10.1021/acs.joc.2c01158
日期:2022.9.16
(sp2)C bond functionalization of (E)-3-styrylquinoxalin-2(1H)-ones and furo[b]annulation via the 5-exo-cyclization in dimethyl sulfoxide (DMSO). The reaction represents a novel strategy for the synthesis of 2-aryl-3-(methylthio)furo[2,3-b]quinoxalines and involves 3-(1,2-dibromo-2-arylethyl)quinoxalin-2(1H)-ones and 2-arylfuro[2,3-b]quinoxalines as key intermediates. Furthermore, DMSO was converted to
已经开发了一种新工艺,用于溴促进的顺序 (sp 2 )C = (sp 2 )C 键官能化 ( E )-3-styrylquinoxalin-2(1 H )-ones 和通过 5 进行的呋喃 [ b ] 环化-在二甲亚砜 (DMSO) 中外环化。该反应代表了一种合成 2-aryl-3-(methylthio)furo[2,3- b ]quinoxalines 的新策略,涉及 3-(1,2-dibromo-2-arylethyl)quinoxalin-2(1 H ) -ones 和 2-芳基呋喃[2,3- b]喹喔啉作为关键中间体。此外,DMSO 原位转化为二甲基硫醚,作为反应中的甲硫基化试剂。该协议构成了一种有效且方便的方法,用于 ( E )-3-styrylquinoxalin-2(1 H )-在室温下以高产率对具有多种官能团的化合物进行环化和甲基硫醇化。