作者:Jiunn-Jye Hwang、James M Tour
DOI:10.1016/s0040-4020(02)01409-6
日期:2002.12
The combinatorial synthesis of oligo(phenylene ethynylene) tetramers, both in solution and on solid support, is described. These products are of interest for molecular electronics applications. An iterative sequence, coupling of aryl halides to alkynes under Sonogashira conditions, was used. Five monomers functionalized with electron-donating or electron-withdrawing groups were synthesized, and used
描述了在溶液中和在固体载体上的低聚(亚苯基乙炔基)四聚体的组合合成。这些产品对于分子电子应用很感兴趣。使用了一个迭代序列,即在Sonogashira条件下将芳基卤化物偶联至炔烃。合成了用供电子或吸电子基团官能化的五种单体,并在基于溶液相的过程中将其用于生成25个三聚体的文库。通过随后的protodesilylation并与鳄鱼夹4-碘-1-硫代乙酰苯偶联,制备了24种四聚体的文库。基于溶液相的序列已成功地适应了更高产率的定向分流-池固相工艺,在七个步骤中,每个步骤的平均产率为78-86%。使用三氮烯连接基团将起始单体连接至聚合物珠粒。在基于固相的过程完成时,通过在10%HCl / THF溶液中对树脂进行超声处理,可实现三聚体从树脂上的无痕裂解。然后将释放的产品准备好进行鳄鱼夹固定的最后步骤。