乙炔基封端的苯醚合成.pdfVIP

Synthesis of ethynyl end-capped oligo-aryl ethers 1 Xu Jinfeng Shen Yongjia* Institute of Fine Chemicals Institute of Fine Chemicals East China University of Science and Technology East China University of Science and Technology Shanghai 200237, P. R . China Shanghai 200237, P. R . China eleven_xu@163.com yjshen@ Wang Chengyun Institute of Fine Chemicals East China University of Science and Technology Shanghai 200237, P. R . China cywang@ Abstract A series of aryl ether oligomers end-capped with ethynyls were synthesized via a three-step process, i.e. iodination of oligo-aryl ethers, nucleophilic substitution of iodide group with 2-methyl-3-butyn-2-ol catalyzed by Pd/Cu and subsequent deacetonation in KOH / toluene. Effects of reaction temperature on iodination and Pd/Cu catalyst on substitution reaction are discussed. Keywords: monomers, oligomers, halogenated, high temperature materials, synthesis 1 Introduction Recently, many kinds of organic polymers have been developed as promising optical materials for use in short-distance optical interconnections and for the fabrication of many optical components such as splitters, combiners, multiplexers, switches, attenuators, and filters. Representative materials for passive waveguides are fluorinated polyacrylates[1], aromatic polysulfides and aromatic polyimides[2]. To be compatible with the sem