Construction of bi(hetero)aryls <i>via</i> dicyanopyrazine-mediated photochemical cross-coupling
作者:Zuzana Burešová、Veronika Jandová、Milan Klikar、Monika Grygarová、Filip Bureš
DOI:10.1039/d2ob01836e
日期:——
photochemical cross-coupling protocol towards bi(hetero)aryls has been developed. The coupling reactions were mediated by dicyanopyrazine photoredox catalyst, while a photoinduced disproportionation process has been identified as an accompanying mechanism, especially for pyrrole derivatives. The developed method allows the cross-coupling of five-membered rings such as pyrrole, imidazole, thiazole and
已经开发了针对双(杂)芳基的光化学交叉偶联方案。偶联反应由二氰基吡嗪光氧化还原催化剂介导,而光诱导歧化过程已被确定为伴随机制,特别是对于吡咯衍生物。开发的方法允许交叉偶联五元环,如吡咯、咪唑、噻唑和恶唑以及各种二嗪(吡啶和嘧啶)和苯衍生物。还公开了一种似是而非的反应机制。通过构建阿托伐他汀核心或通过苯并[ c的逐渐功能化,证明了所开发方法的实际应用和相关性][1,2,5]噻二唑。总共制备了 21 个双(杂)芳基化合物,产率在 19% 到 95% 之间。