A Four-Step Synthesis of Substituted 5,11-Dicyano-6,12-diaryltetracenes with Enhanced Stability and High Fluorescence Emission
作者:Nicolas Kerisit、Przemyslaw Gawel、Brian Levandowski、Yun-Fang Yang、Víctor García-López、Nils Trapp、Laurent Ruhlmann、Corinne Boudon、Kendall N. Houk、François Diederich
DOI:10.1002/chem.201703903
日期:2018.1.2
A four‐step synthesis of substituted 5,11‐dicyano‐6,12‐diaryltetracenes was developed, starting from readily available para‐substituted benzophenones. The key step of this straightforward route is the complex cascade reaction between tetraaryl[3]cumulenes and tetracyanoethene (TCNE) resulting in 5,5,11,11‐tetracyano‐5,11‐dihydrotetracenes. The mechanism of this transformation was reinvestigated by
从容易获得的对位取代的二苯甲酮开始,开发了一种四步合成取代的5,11-二氰基-6,12-二芳基四烯酮。这种简单方法的关键步骤是四芳基[3]枯烯与四氰基乙烯(TCNE)之间的复杂级联反应,产生5,5,11,11-tetracyano-5,11-dihydrotetracenes。通过理论计算重新研究了这种转变的机理。通过Cu I或Cu II催化的新开发的脱氰/芳构化反应获得目标四碳原子。溶液中的配合物,可与各种官能团兼容的条件。计算机制研究为这种转变提供了启示。X射线晶体学证实了所有并四苯衍生物的结构。所提出的双氰基四氢呋喃衍生物具有出色的光电性能和增强的光稳定性,大大超过了参考红荧烯(5,6,11,12-四苯基并四苯)。