Hydrothiolation of Alkenes and Alkynes Catalyzed by 3,4-Dimethyl-5-vinylthiazolium iodide and Poly(3,4-dimethyl-5-vinylthiazolium) iodide
作者:Supill Chun、Junyong Chung、Ji Eun Park、Young Keun Chung
DOI:10.1002/cctc.201600363
日期:2016.8.8
The highly selective anti‐Markovnikov addition of thiols to unactivated alkenes and alkynes was demonstrated by using 3,4‐dimethyl‐5‐vinylthiazolium iodide or its polymer, poly(3,4‐dimethyl‐5‐vinylthiazolium) iodide, as a complementary catalyst. The reaction proceeded cleanly under base‐free conditions in air with both aromatic and aliphatic thiols. The polymer catalyst showed a high turnover number
通过使用3,4-二甲基-5-乙烯基噻唑鎓碘化物或其聚合物碘化聚(3,4-二甲基-5-乙烯基噻唑鎓)碘作为辅助催化剂,证明了硫醇在未活化的烯烃和炔烃中的高选择性抗Markovnikov加成反应。 。该反应在无碱条件下于空气中与芳香族和脂肪族硫醇一起干净地进行。该聚合物催化剂显示出高周转率(≈5800),可以重复使用多达四次而不会损失任何催化活性。DFT计算支持噻唑鎓阳离子稳定噻吩基中间体,这导致自由基与不饱和C-C键反应。