Iodonium Ion-Induced Cyclization and Aryl Migration of <i>ortho</i>-Hydroxystilbenes for the Synthesis of 3-Aryl-2,3-dihydrobenzofuran
作者:Ying Chen、Yiyao Fan、Yanqiu Li、Chunsuo Yao
DOI:10.1021/acs.joc.3c00440
日期:2023.8.18
reported first. This reaction features the cyclization and aryl migration reaction of ortho-hydroxystilbene in ethanol, which is mediated by an iodonium ion, under ambient conditions. A class of ADB was prepared efficiently in good to excellent yields. Mechanism investigation revealed that acids and alcohols facilitated aryl migration, but alkaline and non-alcohol solvents promoted β elimination. The
首次报道了一种有效合成 3-芳基-2,3-二氢苯并呋喃 (ADB) 的简便且通用的方案。该反应的特点是邻羟基芪在乙醇中的环化和芳基迁移反应,该反应由碘鎓离子在环境条件下介导。一类 ADB 得到有效制备,产率良好至优异。机理研究表明,酸和醇促进芳基迁移,但碱性和非醇溶剂促进β消除。两个放大反应进一步证实了该策略的实用性,并在有效的合成精制中得到了证明。