摘要
以2,3,4-三氟苯胺为原料,经桑德迈尔反应合成出2,3,4-三氟碘苯,2,3,4-三氟碘苯和2-甲基-3-丁炔-2-醇在四(三苯基膦)钯催化下合成4-(2,3,4-三氟苯)-2-甲基-3-丁炔-2-醇。4-(2,3,4-三氟苯)-2-甲基-3-丁炔-2-醇在氢氧化钾作用下生成2,3,4-三氟苯乙炔。2,3,4-三氟苯乙炔与6种碘代苯发生Sonogashira反应,合成出6种2,3,4-三氟二苯乙炔类液晶化合物。进行了产品结构标定以及参数的测定,确定了化合物具有较大的光学各向异性(Δn),较宽的相变温度范围。
2,3,4-trifluoroiodobenzene is prepared with 2,3,4-trifluorophenylamine by sandmeyer reaction.4-（2,3,4-Trifluorophenyl）-2-methylbut-3-yn-2-ol is prepared with 2,3,4-trifluoroiodobenzene and 2-methyl-3-butyn-2-ol.2,3,4-trifluorophenylacetylene is prepared with 4-（2,3,4-trifluo-rophenyl）-2-methylbut-3-yn-2-ol and potassium hydroxide in paraffin oil.Six derivatives of 2,3,4-trifluorotolanes are prepared with 2,3,4-trifluorophenylacetylene and six derivatives of iodobenzene by Sonogashira reactions.These compounds not only have large optical anisotropy（Δn）.but also have wider nematic phase temperature range by a series photo electricity test and DSC analysis.
出处
《液晶与显示》
CAS
CSCD
北大核心
2010年第4期473-476,共4页
Chinese Journal of Liquid Crystals and Displays
