with I2 and IBr, respectively. These dihalo-substituted pentalenes reacted with terminal ethynes in Sonogashira coupling and with arylboronic acid in Suzuki–Miyaura coupling to give a series of phenylethynyl- and/or aryl-substituted pentalenes. Suzuki–Miyaura coupling of the halopentalenes with in situ prepared pentaleneboronic esters provided bis-, tri-, and tetra(dibenzopentalene)s. It was found that
通过分别用I 2和IBr处理5,6,11,12-四氢二苯并[ a,e ]环
辛烯来获得二
碘和
溴碘取代的二苯并
戊烯。这些二卤代
戊烯与Sonogashira偶联中的末端
乙炔和铃木-Miyaura偶联中的芳基
硼酸反应,生成一系列
苯乙炔基和/或芳基取代的
戊烯。卤代
戊烯与原位制备的
戊烯硼酸酯的Suzuki-Miyaura偶联提供了双,三和四(二苯并
戊烯)。发现这些二苯并
戊烯低聚物经历了容易的电
化学还原,并且由于它们扩展的π系统而在UV-vis吸收光谱中呈现出红移。