Head-to-Tail Regioregular Oligothiophene-Functionalized 9,9‘-Spirobifluorene Derivatives. 1. Synthesis
作者:Jian Pei、Jing Ni、Xing-Hua Zhou、Xiao-Yu Cao、Yee-Hing Lai
DOI:10.1021/jo011146z
日期:2002.7.1
Two series of novel fully conjugated oligomers, oligothiophene-functionalized 9,9'-spirobifluorene derivatives, have been developed in this contribution. First, four 9,9'-spirobifluorene bromide derivatives (compounds 1a-d) are prepared through various synthetic routes. Oligothiophene derivatives with or without substituents are synthesized through the Grignard and Suzuki coupling reactions. The Negishi
在这一贡献中,已经开发出两个系列的新颖的完全共轭的低聚物,低聚噻吩官能化的9,9'-螺二芴衍生物。首先,通过各种合成途径制备了四个9,9'-螺双芴溴化物衍生物(化合物1a-d)。通过Grignard和Suzuki偶联反应合成具有或不具有取代基的寡噻吩衍生物。少聚噻吩基氯化锌与各种以Pd(PPh(3))(4)为催化剂的9,9'-螺二芴溴化物之间的Negishi偶联反应成功产生了所需的化合物,未取代的由低聚噻吩官能化的9,9'-螺二芴衍生物,化合物2至4a-d。由于Negishi偶联反应提供了区域规则的头尾(HT)寡聚(4-n-己基噻吩)功能化的9,9' -螺双芴衍生物收率低,4-正己基噻吩基-2-硼酸钠8与各种9,9'-螺双芴基溴化物1a-d和9-16之间的Suzuki偶联反应用于产生高度区域规则的头部-尾寡聚噻吩官能化的9,9'-螺二芴衍生物(化合物5至7a-d),产率很高。我们还研究了溶