Polymer-Supported Synthesis of Regioregular Head-to-Tail-Coupled Oligo(3-arylthiophene)s Utilizing a Traceless Silyl Linker
作者:Christoph A. Briehn、Thomas Kirschbaum、Peter Bäuerle
DOI:10.1021/jo991188b
日期:2000.1.1
The solid-phase synthesis of regioregular head-to-tail-coupled oligo(3-arylthiophene)s has been achieved in high yield and purity by using a traceless silyl ether linkage. In the first step, the solution-phase synthesis of this class of conjugated oligomers was investigated. Benzyl alcohol was chosen to serve as a mimic for the anchoring group of the hydroxymethyl-substituted polystyrene matrix. The
通过使用无痕的甲硅烷基醚键,以高产率和高纯度实现了区域规则的头对尾偶联的低聚(3-芳基噻吩)的固相合成。在第一步中,研究了这类共轭低聚物的溶液相合成。选择苄醇来模拟羟甲基取代的聚苯乙烯基质的锚定基团。甲硅烷基保护的噻吩的新型区域选择性碘化工艺的发展促进了溶液相方案成功应用于固相。在咪唑存在下,通过氯甲硅烷基官能化的3-芳基噻吩与羟甲基聚苯乙烯的反应获得令人满意的负载量。季铵盐(3-芳基噻吩)的制备说明了以下迭代卤代和Suzuki交叉偶联序列的适用性,季铵盐(3-芳基噻吩)是在固体载体上合成的第一个区域规则的头对尾偶联的寡聚噻吩。通过用四丁基氟化铵处理可以有效地从固体载体上除去共轭低聚物。