Synthesis of Nanostructures Based on 1,4- and 1,3,5-Ethynylphenyl Subunits with π-Extended Conjugation. Carbon Dendron Units
作者:J. Gonzalo Rodríguez、Jorge Esquivias、Antonio Lafuente、Cristina Díaz
DOI:10.1021/jo034972b
日期:2003.10.1
5-ethynylphenyl oligomers were synthesized starting from 3,5-di(trimethylsilylethynyl)phenylacetylene and p-[3,5-di(trimethylsilylethynyl)-1-ethynylphenyl]phenyl acetylene by cross-coupling reaction with a convenient haloaryl derivative, catalyzed by palladium(II)/copper(I), in excellent yield. The terminal acetylenes were efficiently prepared by a specific protection-deprotection methodology. All ethynylphenyl
从3,5-二(三甲基甲硅烷基乙炔基)苯基乙炔和对-[3,5-二(三甲基甲硅烷基乙炔基)-1-乙炔基苯基]苯基乙炔开始,合成了纳米级共轭的1,4-和1,3,5-乙炔基苯基低聚物。钯(II)/铜(I)催化的方便卤代芳基衍生物交叉偶联反应,收率很高。通过特定的保护-脱保护方法有效地制备了末端乙炔。所获得的所有乙炔基苯基同系物均显示出荧光发射,每个乙炔基苯基单元的红移大约为20 nm,从而增加了共轭链。通过插入1,5-萘亚单元制备平行的共轭乙炔基苯基链,并且该化合物表现出荧光辐射发射。