An improved, modular synthesis of rigid, geometrically well-defined, alkyne-substituted tetracene (1) and pentacene (2) dimers is reported. The synthesis is rooted in sequential Diels–Alder reactions of a norbornyl tetraene with triisopropylsilylacetylene-substituted (TIPS-acetylene) quinone dienophiles. The incorporation of solubilizing and stabilizing TIPS-acetylene groups early in the synthesis
据报道,一种改进的,模块化的,刚性的,几何定义明确的,
炔烃取代的
并四苯(1)和
并五苯(2)二聚体的合成。该合成源于降
冰片基四烯与
三异丙基甲
硅烷基
乙炔基取代的(
TIPS-
乙炔)醌二亲二烯物的顺序Diels-Alder反应。在合成早期就加入了可溶和稳定的
TIPS-
乙炔基团,提供了一种温和而可靠的途径,这是首次获得
降冰片烯桥联的
并五苯二聚体。还描述了这些分子的激发态行为的初步探索。