作者:Omar Hassan Omar、Francesco Babudri、Gianluca M. Farinola、Francesco Naso、Alessandra Operamolla
DOI:10.1002/ejoc.201001049
日期:2011.1
A novel class of tetrathiolated aryleneethynylene oligomers was obtained by the Cassar-Heck-Sonogashira coupling between S,S'-(5-ethynyl-1,3-phenylene) bis(methylene) diethanethioate (1) and aryl diiodides or dibromides. Although standard coupling conditions are effective in the case of iodo derivatives, the addition of free triphenylphosphane to the reaction mixture was required to overcome the slower
通过 S,S'-(5-乙炔基-1,3-亚苯基) 双 (亚甲基) 二乙硫酸酯 (1) 和芳基二碘化物或二溴化物之间的 Cassar-Heck-Sonogashira 偶联获得了一类新的四硫代亚芳基乙炔基低聚物。尽管标准偶联条件在碘衍生物的情况下是有效的,但需要向反应混合物中加入游离三苯基膦以克服二溴芳烃较慢的反应速率。通过应用相同的合成方法,可以从更高的同源物 1 开始获得具有扩展共轭系统的低聚物。这些低聚物代表了有趣的分子线,可能能够在各种基材上自组装,包括薄膜或纳米颗粒形式的金和其他贵金属。