Synthesis of dehydrobenzoannulenes (DBAs) with pyrene core from 1,8-diethynylpyrene and 1,3,6,8-tetraethynylpyrene as building blocks is reported. A sequence involving Sonogashira coupling, Corey–Fuchs reaction and oxidative coupling (Eglinton coupling) is used for the synthesis of pyrene-based dehydrobenzoannulenes. Due to the presence of pyrenechromophore these DBAs and their precursors are highly fluorescent and emit in the visible region, due to extended conjugation of the acetylenic units with the pyrene core.
报告以 1,8-二
乙炔基
芘和 1,3,6,8- 四
乙炔基
芘为结构单元,合成了以
芘为核心的
脱氢苯并
芘 (
DBA)。在合成
芘基
脱氢化
苯并呋喃时,采用了包括 Sonogashira 偶联、Corey-Fuchs 反应和
氧化偶联(Eglinton 偶联)的顺序。由于
芘色素的存在,这些
DBAs 及其前体具有很强的荧光性,并在可见光区域发光,这是由于
乙炔单元与
芘核的延伸共轭作用所致。