α-硫代碳正离子（硫鎓离子）作为烯酮衍生的1,3-二噻烷和1,3-二硫戊环在布朗斯特酸催化反应中的中间体
α-Thio Carbocations (Thionium Ions) as Intermediates in Brønsted Acid-Catalyzed Reactions of Enone-Derived 1,3-Dithianes and 1,3-Dithiolanes.
作者信息
Brenninger Christoph, Bach Thorsten
机构信息
Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany.
出版信息
Top Catal. 2018;61(7):623-629. doi: 10.1007/s11244-018-0905-6. Epub 2018 Mar 5.
Abstract
ABSTRACT
Evidence was collected for the intermediate formation of thionium ions in Brønsted acid-catalyzed [2 + 2] photocycloaddition and electrophilic addition reactions to enone dithianes and dithiolanes. Low-temperature NMR studies helped to elucidate the structure and configuration of the thionium ions and thus support previous and current results obtained by UV/Vis spectroscopy.
摘要
摘要
收集了关于在布朗斯特酸催化的[2 + 2]光环加成反应以及对烯酮二噻烷和二硫戊环的亲电加成反应中硫鎓离子中间形成的证据。低温核磁共振研究有助于阐明硫鎓离子的结构和构型，从而支持先前以及目前通过紫外/可见光谱法获得的结果。
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