Thiol-Triggered Tandem Dearomative Michael Addition/Intramolecular Henry Reaction of 2-Nitrobenzofurans: Access to Sulfur-Containing Polyheterocyclic Compounds
作者:Jun-Rui Zhuo、Jian-Qiang Zhao、Lei Yang、Yu-Lu Wu、Yan-Ping Zhang、Yong You、Zhen-Hua Wang、Ming-Qiang Zhou、Wei-Cheng Yuan
DOI:10.1021/acs.orglett.4c00646
日期:2024.4.5
thiol-triggered tandem Michael addition/intramolecular Henry reaction has been developed. A range of thiochromeno[3,2-b]benzofuran-11-ols and tetrahydrothieno[3,2-b]benzofuran-3-ols could be obtained in up to 99% yield and up to >20:1 dr. The valuable thiochromone fused benzofurans could be prepared with the reaction of 2-nitrobenzofurans and 2-mercaptobenzaldehyde via the tandem dearomative Michael addition/intramolecular
已经开发出一种通过硫醇触发的串联迈克尔加成/分子内亨利反应对 2-硝基苯并呋喃进行有效脱芳环化的方法。一系列硫代苯并[3,2- b ]苯并呋喃-11-醇和四氢噻吩并[3,2- b ]苯并呋喃-3-醇的产率高达 99%,dr 高达 >20:1。 2-硝基苯并呋喃与2-巯基苯甲醛通过串联脱芳香迈克尔加成/分子内亨利反应/重芳香化/氧化脱氢一锅两步操作制备有价值的硫色酮稠合苯并呋喃。初步提出了该反应的机理。