Cooperative Photoinduced/Brønsted Acid Catalyzed Cycloaddition of Transient Thioaldehydes and <i>ortho</i>-Quinone Methides toward a Synthesis of Benzo[<i>e</i>][1,3]oxathiines
作者:Florian Sachse、Christoph Schneider
DOI:10.1021/acs.orglett.1c00588
日期:2021.4.2
in situ generation and ensuing cycloaddition of thioaldehydes and ortho-quinone methides transiently formed under irradiation with UV-A light and Brønsted acid catalysis, respectively, has been developed giving direct access to benzo[e][1,3]oxathiines in good to excellent yields and diastereoselectivity. Both electron-rich and electron-poor thioaldehydes easily react with a broad range of ortho-quinone
已经开发了一种合作的一锅法,用于原位生成并随后分别在UV-A光和Brønsted酸催化下短暂形成的硫代醛和邻醌甲基化物环加成反应,从而可以直接获得苯并[ e ] [ 1,3]氧杂蒽酮具有良好的收率和非对映选择性。富电子和贫电子的硫醛都可以在环境温度下以很短的反应时间轻松地与各种邻苯二甲基甲烷反应,以提供各种S,O-杂环。