A photocatalytic tandem cyclization of o-alkenylbenzaldehydes using pyridinium salts as the amination reagent is described. A variety of valuable seven-membered nitrogenous heterocyclic skeletons are prepared in modest to excellent yields in concise one-step. This transformation features mild reaction conditions and exceptional functional group tolerance. In addition, combining control experiments and density functional theory (DFT) calculations on the mechanism can explain the reaction selectivity.
描述了一种使用
吡啶盐作为胺化试剂的光催化串联环化反应,该反应适用于o-烯基
苯甲醛。通过简单的一步反应,可以在适中到优秀的产率下制备多种有价值的七元氮杂环骨架。该转化具有温和的反应条件和出色的功能团耐受性。此外,结合对照实验和密度泛函理论(DFT)计算,可以解释反应的选择性。