| 侧向二氟代酯类液晶的合成 |
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| 引用本文： | 王浩,闫凌,张蕾,梁晓,唐洪.侧向二氟代酯类液晶的合成[J].精细化工,2006,23(6):524-526. |
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| 作者姓名： | 王浩 闫凌 张蕾 梁晓 唐洪 |
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| 作者单位： | 清华大学,化学系,有机光电子与分子工程教育部重点实验室,北京,100084 |
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| 摘 要： | 以4-溴-2,3-二氟苯酚为原料,通过与烷基双环己基甲酸或烷基环己基苯甲酸的酯化,生成三环溴代物;然后在氮气保护下,以四三苯基磷钯为催化剂与丁基苯硼酸偶联,制备了两个系列6种四环侧向二氟取代酯类液晶化合物,其总收率大于50%,气相色谱测定了其质量分数均大于99%。目标化合物经IR,1HNMR和MS确认了分子结构。DSC分析表明,该类液晶化合物有很高的清亮点(>280℃)和较宽的介晶相温度范围。
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| 关 键 词： | 液晶 酯化 4-溴-2 3-二氟苯酚 |
| 文章编号： | 1003-5214（2006）06-0524-03 |
| 收稿时间： | 2005-09-23 |
| 修稿时间： | 2005-09-232005-12-21 |
Synthesis of Laterally Difluorinated Ester Liquid Crystal |
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| WANG Hao,YAN Ling,ZHANG Lei,LIANG Xiao,TANG Hong.Synthesis of Laterally Difluorinated Ester Liquid Crystal[J].Fine Chemicals,2006,23(6):524-526. |
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| Authors: | WANG Hao YAN Ling ZHANG Lei LIANG Xiao TANG Hong |
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| Abstract: | Two types of six laterally difluorinated ester liquid crystal compounds were synthesized from 4-bromo-2,3-difluorophenol by esterification with alkyl cyclohexanecarboxylic acid or alkyl bicyclohexanecarboxylic acid and then coupling with 4-butylphenylboronic acid catalyzed by Pd(PPh_3)_4 under N_2.Totle yields of the objective products were higher than 50%.The mass fractions of the pruducts by GC were over 99%.Structures of the liquid crystal compounds were confirmed by IR,~1HNMR and MS.The results of DSC show that these liquid crystal compounds exhibit high clear points(>280 ℃)and broad temperature range of mesomorphic phases. |
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| Keywords: | liquid crystal esterification 4-bromo-2 3-difluorophenol |
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