Versatile synthetic protocols for 2,7‐ and 3,6‐diacetylenic fluorene‐9‐ylidene phosphanes (F9Ps) were developed. Protodesilylation of trimethylsilyl‐protected acetylenic F9Ps affords terminal acetylenes that can be employed in Sonogashira and Glaser‐type C−C coupling reactions to give thienyl‐decorated and butadiyne‐bridged fluorene‐9‐ylidene phosphanes, respectively. As evidenced by UV/Vis spectroscopy
开发了用于2,7-和3,6-二
乙炔芴-9-亚烷基膦(F9Ps)的通用合成方案。三甲基甲
硅烷基保护的
炔烃F9P的原甲
硅烷基化可提供末端
乙炔,可用于Sonogashira和Glaser型C-C偶联反应中,分别得到
噻吩修饰的和
丁二炔桥接的
芴9-亚烷基膦。如UV / Vis光谱学和循环伏安法所证明,并从头算计算得到证实,F9Ps中P中心的存在可显着减少源自LUMO
水平稳定的HOMO-LUMO分裂。
乙炔取代图案的变化是影响光学和电子特性的另一种工具。而3,6-二取代的F9P在400 nm附近具有很强的吸收,主要是由于π–π *跃迁,2,