| 侧向氟代四环类液晶单体的合成 |
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| 引用本文： | 李娟利,安忠维,杜渭松,李建,郑敏燕.侧向氟代四环类液晶单体的合成[J].化学世界,2009,50(9). |
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| 作者姓名： | 李娟利 安忠维 杜渭松 李建 郑敏燕 |
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| 作者单位： | 1. 西安近代化学研究所光电材料中心,陕西,西安,710065
2. 成阳师范学院,陕西,咸阳,712000 |
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| 摘 要： | 以4-(反式-4-烷基环己基)-2-氟苯硼酸和卤代苯为起始原料,采用Suzuki偶联反应合成了2个系列15个侧向氟取代双烷基环己基联苯类液晶,采用1H NMR、IR和MS对其结构进行了确证。讨论了不同催化剂、反应底物量以及不同的碱对反应结果的影响,结果表明:在强碱碳酸钾作用下,Pd(PPh3)4作催化剂、4-(反式-4-烷基环己基)-2-氟代苯硼酸∶卤代苯(摩尔比)=1.1∶1时,反应选择性和收率较高,产品收率最高达89%。
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| 关 键 词： | Suzuki偶联反应 合成 液晶 |
Synthesis of Lateral Fluorine Substituted 4, 4'-Bis-(trans-4-n-alkylcyelohexyl) Biphenyl Liquid Crystals |
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| LI Juan-li,AN Zhong-wei,DU Wei-song,LI Jian,ZHENG Min-yan.Synthesis of Lateral Fluorine Substituted 4, 4'-Bis-(trans-4-n-alkylcyelohexyl) Biphenyl Liquid Crystals[J].Chemical World,2009,50(9). |
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| Authors: | LI Juan-li AN Zhong-wei DU Wei-song LI Jian ZHENG Min-yan |
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| Affiliation: | 1.Optical and Electrical Material Center;Xi'an Modern Chemistry Research Institute;Shaanxi Xi'an 710065;China;2.Department of Chemistry;Xianyang Normal University;Shaanxi Xianyang 712000;China |
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| Abstract: | Two series of fifteen lateral fluorine substituted by 4,4′-bis-(trans-4-n-alkylcyclohexyl)biphenyl liquid crystals were synthesized via Suzuki coupling reaction with 2-fluoro-4-(trans-4-alkylcyclohexyl)phenylboronic and halobenzenes as starting materials.Their structures were confirmed using ~1H NMR,IR and MS.The influence of various catalysts,various ratio of reactants and bases on the reaction was studied.The results showed that with Pd(PPh_3)_4 as catalyst,2-fluoro-4-(trans-4-alkylcyclohexyl) phenylboronic: halobenzenes=1.1∶1(mole ratio) and potassium carbonate as base was the best choice,and the best yield was 89%. |
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| Keywords: | Suzuki cross-coupling reaction synthesis liquid crystals |
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