新型2-烯丙氧基-4-辛氧基苯甲酸对丙基联苯酯的合成及其液晶性能  

Synthesis and Liquid Crystalline Property of Novel 4-(2-Allyloxy-4-octyloxy benzoate)-4'-propylbiphenyl

作　　者：谢建强[1] 朱光明[1] 唐玉生[1] 邓登[1] 宋斐[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710129

出　　处：《合成化学》2012年第6期674-678,共5页Chinese Journal of Synthetic Chemistry

基　　金：西北工业大学基础研究基金资助项目(JC201047)

摘　　要：分别以2,4-二羟基苯甲酸和对苯基苯酚为原料,设计并合成了两种新型液晶中间体2-烯丙氧基-4-辛氧基苯甲酸(5)和4-(4-丙基苯基)苯酚(10);5和10在4-吡咯基吡啶催化下经脱水酯化合成了一个新型的液晶化合物——2-烯丙氧基-4-辛氧基苯甲酸对丙基联苯酯(11),收率81.2%,其结构经1H NMR,13C NMR和元素分析表征。用碘量法测定了11的烯键含量,并用DSC和POM研究了11的液晶性能。结果表明,11为单向向列型液晶化合物,液晶区间55.8℃～12.1℃。Two liquid crystal intermediates,2-allyloxy-4-octyloxy benzoic acid（5） and 4-（4-n-propylphenyl）phenol（10）,were firstly synthesized.A novel reactive liquid crystal monomer,4-（2-allyloxy-4-octyloxy benzoate）-4′-propylbiphenyl（11）,was synthesized in yield 81.2% by esterification of 5 with 10 using 4-pyrrolidinopyridine as the catalyst.The structure was characterized by 1H NMR,13C NMR and elemental analysis.C=C content of 11 was determined by iodometic and the liquid crystalline properties were investigated by DSC and POM.The results showed that 11 was a monotropic nematic liquid crystal compound and the temperature range of liquid crystals was 55.8 ℃～12.1 ℃.

关 键 词：2-烯丙氧基-4-辛氧基苯甲酸 4-(4-丙基苯基)苯酚 反应性液晶 向列相 合成 液晶性能 

分 类 号：O625.5[理学—有机化学]