Synthesis and optical properties of conjugated N,N-dimethyl and thienyl end-capped 2,5-(arylethynyl)thiophene oligomer structures
作者:J. Gonzalo Rodrı́guez、Antonio Lafuente、Laura Rubio、Jorge Esquivias
DOI:10.1016/j.tetlet.2004.07.123
日期:2004.9
by the Cl2Pd(PPh3)2/CuI system, in good to excellent yields. The 2,5-di[(3′,5′-di(trimethylsilylethynyl)phenyl]x-1-ethynyl]thiophene oligomers were prepared by heterocoupling between 3′,5′-di[(trimethylsilylethynyl)phenyl]x-1-ethyne (n = 0–2) terminal acetylenes and 2,5-diiodothiophene, in excellent yields. The terminal acetylenes were efficiently prepared by a specific protection-deprotection methodology
通过在末端乙炔之间进行杂偶合,合成对位封端的(N,N-二甲基氨基苯基)和2'-噻吩基乙炔基2,5-噻吩低聚物结构:p-(N,N-二甲基氨基苯基)乙炔(3)[或1- (p-(N,N-二甲基氨基苯基)-2- p-(乙炔基苯基)乙炔,4];p-(β-乙烯基-2'-噻吩基)苯基乙炔(E -9)[或p-(β-乙炔基- Cl 2 Pd(PPh 3)2催化的2'-噻吩基)苯基乙炔11]和2,5-二碘噻吩/ CuI系统,良率至良率。通过3,,5'-二[(三甲基甲硅烷基乙炔基)苯基] x -1-之间的杂合制备2,5-二[(3',5'-二(三甲基甲硅烷基乙炔基)苯基] x -1-乙炔基]噻吩低聚物乙炔(n = 0–2)末端乙炔和2,5-二碘噻吩,收率很好。通过特定的保护-脱保护方法有效地制备了末端乙炔。所有获得的乙炔基苯基化合物均显示出荧光辐射发射,红移为随着链共轭增加的波长。