Highly Selective Activation of Vinyl C-S Bonds Over Aryl C-S Bonds in the Pd-Catalyzed Coupling of (E)-(β-Trifluoromethyl)vinyldiphenylsulfonium Salts: Preparation of Trifluoromethylated Alkenes and Dienes
作者:Hao Lin、Xicheng Dong、Yuxue Li、Qilong Shen、Long Lu
DOI:10.1002/ejoc.201200758
日期:2012.9
We describe the Suzuki coupling reaction of (E)-(beta-trifluoromethyl)vinyldiphenylsulfonium salts with arylboronic acid. The highly efficient and selective reaction provides a useful and mild method for the synthesis of trifluoromethylated alkenes and dienes. Subsequent DFT studies showed that the oxidative addition transition state of the vinyl CS bond is much more favorable (11.7 kcal?mol1) than
我们描述了 (E)-(β-三氟甲基) 乙烯基二苯基锍盐与芳基硼酸的 Suzuki 偶联反应。高效和选择性的反应为合成三氟甲基化烯烃和二烯烃提供了一种有用且温和的方法。随后的 DFT 研究表明,乙烯基 CS 键的氧化加成过渡态比芳基 CS 键更有利(11.7 kcal?mol1)。