3-甲氧基-6-(4-烷氧苯基)哒嗪的合成及介晶性研究  

Synthesis and Liquid Crystal Behavior of 3-Methoxy-6-(4-alkoxyphenyi)pyridazine

作　　者：熊俊如[1] 刘静[1] 张元勤[1] 

机构地区：[1]乐山师范学院环境与生命科学系,四川乐山614004

出　　处：《合成化学》2003年第1期68-71,共4页Chinese Journal of Synthetic Chemistry

基　　金：乐山师范学院基金资助项目

摘　　要：在三苯基膦钯的催化下 ,由 3 -氯 -6-甲氧基哒嗪与对烷氧苯基硼酸偶联合成了 7种具有液晶性的中心桥连基为哒嗪环、不同烷氧基长度的含有苯环的哒嗪衍生物 ,并通过 DSC和偏光显微镜对其介晶性进行了表征。研究表明 ,末端链长度对相变温度和清亮点温度均有影响 。Seven new 3-methoxy-6-(4-alkoxyphenyi)pyridazines which contain a benzene ring, an alkoxyl group of different length has been synthesized through the cross-coupling reaction of 3-halo-6-methoxypyridazines with 4-alkoxyphenylborate in the presence of palladium catalyst. Their mesogenic behaviors have been studied through DSC and optical microscope. The length of the terminal chain can affect the transition and clearing point temperatures of the compound, but has a little influence on the temperature range of mesophases.

关 键 词：3-甲氧基-6-(4-烷氧苯基)哒嗪 哒嗪衍生物 烷氧基硼酸 三苯基膦钯 催化合成 介晶性 催化剂 

分 类 号：O626.3[理学—有机化学] O621.21[理学—化学]