First Palladium-Catalyzed Direct Regioselective C-5 (Het)Arylation of Mono- or Disubstituted Thiazolo[3,2-<i>b</i>][1,2,4]triazoles
作者:Mikaël Le Meur、Stéphane Bourg、Stéphane Massip、Mathieu Marchivie、Christian Jarry、Gérald Guillaumet、Sylvain Routier
DOI:10.1002/ejoc.201402193
日期:2014.6
polysubstituted thiazolo[3,2-b][1,2,4]triazoles through C-5 (het)arylation. The direct C–H activation protocol giving access to di- and trisubstituted derivatives in excellent yields was optimized. The method is suitable for use with a wide range of (hetero)aryl bromides, and allows access to a collection of C-5,6 bis(het)aryl derivatives with full regioselectivity. The results are supported by a full description
开发了一种通过 C-5 (het) 芳基化形成多取代噻唑并 [3,2-b][1,2,4] 三唑的高效便捷方法。优化了直接 C-H 活化方案,以优异的产率获得二取代和三取代衍生物。该方法适用于广泛的(杂)芳基溴化物,并允许获得具有完全区域选择性的 C-5,6 双(杂)芳基衍生物的集合。结果得到了所有最终化合物的完整描述的支持,X 射线晶体学数据证实了光谱分析的正确解释。