Electrophilic Vinylation of Thiols under Mild and Transition Metal‐Free Conditions
作者:Laura Castoldi、Ester Maria Di Tommaso、Marcus Reitti、Barbara Gräfen、Berit Olofsson
DOI:10.1002/anie.202002936
日期:2020.9
methodology displays high functional group tolerance and proceeds under mild and transition metal‐free conditions without the need for excess substrate or reagents. Mercaptothiazoles could be vinylated under modified conditions, resulting in opposite stereoselectivity compared to previous reactions with vinyliodonium salts. Novel VBX reagents with substituted benziodoxolone cores were prepared, and improved
碘(III)试剂乙烯基苯并恶恶唑酮(VBX)用于乙烯基化一系列脂肪族和芳香族硫醇,从而使E-烯基硫化物具有完全的化学和区域选择性以及出色的立体选择性。该方法具有很高的官能团耐受性,可在温和和无过渡金属的条件下进行,而无需过量的底物或试剂。巯基噻唑可以在改性条件下被乙烯基化,与以前与乙烯基碘鎓盐的反应相比,导致相反的立体选择性。制备了具有取代的苯并恶唑酮核心的新型VBX试剂,发现与二甲基取代的核心相比,反应性得到了改善。