Gold(I)‐Catalyzed Carbothiolation via Rearrangement of S‐Propargyl Group: An Access to 3‐Allenyl or 3‐Indenyl Benzo[
<i>b</i>
]thiophenes
作者:Camille Van Wesemael、Nicolas Brach、Mihaela Gulea、Gaëlle Blond
DOI:10.1002/adsc.202201000
日期:2022.12.8
A series of 3-allenyl benzo[b]thiophenes were synthesized through a gold(I)-catalyzed domino reaction. The process consists in a 5-endo-dig cyclization with C−S bond formation and consecutive S-to-C propargyl migration via [3,3]-sigmatropic Claisen rearrangement. With aryl substituents on both triple bonds of the substrate, subsequent intramolecular hydroarylation on the formed allenyl system led to
通过金(I)催化的多米诺骨牌反应合成了一系列3-烯基苯并[b]噻吩。该过程包括 5-endo-dig 环化与 CS 键形成和通过 [3,3]-sigmatropic Claisen 重排的连续 S-to-C 炔丙基迁移。在底物的两个三键上都有芳基取代基,随后在形成的丙二烯基系统上进行分子内加氢芳基化,生成 3-茚基苯并[b]噻吩。从带有 3-丁炔醇部分的底物,通过分子内加氢烷氧基化获得了多种稠合的 O-杂环。还描述了金介导的 1,3-迁移,涉及烯基到炔丙基重排。