CN100391923C - 烷基环己基多氟联苯衍生物及其制备方法与应用 - Google Patents
烷基环己基多氟联苯衍生物及其制备方法与应用 Download PDFInfo
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Abstract
本发明公开了烷基环己基多氟联苯衍生物及其制备方法与应用。本发明所提供的烷基环己基多氟联苯类液晶衍生物,其结构式为式I,其中,R为1~10的直链烷基;(A)为H或F。本发明化合物在联苯环的侧向上引入了甲氧基,由于该类基团空间体积较小,电偶距不大并且平均偶极方向在分子长轴方向,所以有利于增大化合物分子在分子长轴方向的介电各向异性,降低物质的熔点,增加溶解性,此外,多个氟原子的存在也有利于增大化合物分子在分子长轴方向的介电各向异性,从而降低液晶材料的驱动电压,该类物质在液晶显示领域有良好的应用前景。
Description
技术领域
本发明涉及化合物及其制备方法与应用,特别是涉及一种烷基环己基多氟联苯衍生物及其制备方法,以及该化合物在液晶显示中的应用。
背景技术
随着TFT液晶显示(Thin Solid Film)的飞速发展,对高性能液晶材料的要求越来越迫切,尤其为得到更宽的工作温度范围,降低驱动电压,实现显示器件的低功耗,研制介电各向异性大,熔点低,介晶温度范围宽的高性能液晶材料是TFT用液晶材料今后的研究方向。
发明内容
本发明的目的是提供一种烷基环己基多氟联苯类液晶及其制备方法。
本发明所提供的烷基环己基多氟联苯类液晶衍生物,其结构式为式I,
其中,R为碳原子数为1~10的直链烷基;(A)为H或F。
更具体的,本发明的烷基环己基多氟联苯衍生物包括:
4’-(4”-反式-甲基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-乙基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-丙基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-丁基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-戊基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-己基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-庚基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-辛基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-壬基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-癸基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-甲基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-乙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-丙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-丁基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-戊基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-己基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-庚基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-辛基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-壬基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-癸基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯。
本发明化合物的制备方法有两种技术方案:
方案-,包括如下步骤:1)制备3,4-二氟-2-甲氧基苯硼酸:将3,4-二氟-2-甲氧基溴苯与金属镁反应生成格利雅试剂,然后与硼酸三甲酯反应,水解后得到结构式如式II的3,4-二氟-2-甲氧基苯硼酸;2)制备烷基环己基多氟联苯衍生物:将结构式如式II的3,4-二氟-2-甲氧基苯硼酸与结构式如式III的化合物在催化剂作用下进行偶联反应,得到所述3,4-二氟-2-甲氧基联苯衍生物;所述催化剂为四(三苯基膦)合钯;
其中,步骤2)所述偶联反应的温度为60-90℃,反应溶剂为苯和无水乙醇。
反应方程式如下:
其中,R、(A)的定义与式I相同。
方案二,包括如下步骤:1)制备结构式为式IV的化合物:将结构式为式III的化合物与金属镁反应生成格利雅试剂,然后与硼酸三甲酯反应,水解后得到结构式为式IV的化合物;2)制备烷基环己基多氟联苯衍生物:将结构式为式IV的化合物与结构式如式V的3,4-二氟-2-甲氧基溴苯在催化剂作用下进行偶联反应,得到所述烷基环己基多氟联苯衍生物;所述催化剂为四(三苯基膦)合钯;
其中,步骤2)所述偶联反应的反应温度为60-90℃,反应溶剂为苯和无水乙醇。
反应方程式如下:
其中,R、(A)的定义与式(I)相同。
本发明的另一个目的是提供本发明化合物的用途。
本发明化合物具有Δε大,熔点低,脂溶性好等优点,是一种性能良好的液晶显示材料,因此,以本发明的烷基环己基多氟联苯衍生物为主要成分的液晶显示材料也属于本发明的保护范围。
本发明化合物在联苯环的侧向上引入了甲氧基,由于该类基团空间体积较小,电偶距不大并且平均偶极方向在分子长轴方向,所以有利于增大化合物分子在分子长轴方向的介电各向异性,降低物质的熔点,增加溶解性,此外,多个氟原子的存在也有利于增大化合物分子在分子长轴方向的介电各向异性,从而降低液晶材料的驱动电压,该类物质在液晶显示领域有良好的应用前景。
具体实施方式
实施例1、制备4’-(4”-反式-戊基环己基)-3,4,2’-三氟-2-甲氧基联苯,
1、制备3,4-二氟-2-甲氧基苯硼酸
往250ml三口瓶中加入22.3g(0.1mol)3,4-二氟-2-甲氧基溴苯,50ml四氢呋喃,2.43g(0.1mol)金属镁和1~2粒碘,在室温下引发反应后搅拌反应1小时,然后用乙醇-液氮体系将***温度降至-70℃,在此温度下缓慢滴加10.4g(0.1mol)硼酸三甲酯,滴加完毕后在搅拌条件下使其自然升至室温,然后滴加10%的HCl溶液至pH值为1,加热到100℃下回流1小时。将反应液冷却后用100ml×3的石油醚萃取水相后,再用饱和食盐水洗涤至中性,用无水硫酸钠干燥过夜。将干燥后的溶液旋蒸出去溶液,得到15.9g 3,4-二氟-2-甲氧基苯硼酸,收率85%。
2、制备4’-(4”-反式-戊基环己基)-3,4,2’-三氟-2-甲氧基联苯,
往500ml三口瓶中加入15.9g(0.085mol)3,4-二氟-2-甲氧基苯硼酸,27.8g(0.085mol)4-(4’-反式-戊基环己基)-2-氟-溴苯,150ml苯,60ml无水乙醇,25g碳酸钠,6.6g水以及1.96g四(三苯基膦)合钯,加热到70℃下回流24小时后冷却至室温。分出有机相,用100ml×3三氯甲烷萃取水相,合并有机相后水洗至中性,用无水硫酸钠干燥。将干燥后的溶液旋蒸出去溶液,得到白色粗品29g,用无水乙醇重结晶,得到20.6g 4’-(4”-反式-戊基环己基)-3,4,2’-三氟-2-甲氧基联苯的白色晶体,收率62%。
DSC(差示扫描量热计):Cr45.9℃ I
IR(波数/cm-)1:3010,2947,2854,1876,1614,1595,1568,1491,1475,1412,1367,1310,1281,1240,1 178,1132,1080,1041,955,943,864,812,762,669,627,613,538
MS:390(M+),375,319,279,278,265,264,251,247,237,219,201,183,175,153,143,109,97,95,83,81,71,69,57,55,43
证明所得产物正确。
用相同的方法可以得到:
4’-(4”-反式-甲基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-乙基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-丙基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-丁基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-己基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-庚基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-辛基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-壬基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-癸基环己基)-3,4,2’-三氟-2-甲氧基联苯。
实施例2、4’-(4”-反式-丙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯
1、制备4-(反式-4’-丙基环己基)-2,6-二氟-苯硼酸
往250ml三口瓶中加入31.7g(0.1mol)4-(反式-4’-丙基环己基)-2,6-二氟-溴苯,100ml四氢呋喃,2.43g(0.1mol)金属镁和1~2粒碘,在室温下引发反应后搅拌1小时,然后用乙醇-液氮体系将***温度降至-70℃,在此温度下缓慢滴加10.4g(0.1mol)硼酸三甲酯,滴加完毕后在搅拌条件下使其自然升至室温,然后滴加10%的HCl溶液至pH值为1,加热到100℃下回流1小时。将反应液冷却后用100ml×3的石油醚萃取水相后,再用饱和食盐水洗涤至中性,用无水硫酸钠干燥过夜。将干燥后的溶液旋蒸出去溶液,得到19.8g4-(反式-4’-丙基环己基)-2,6-二氟-苯硼酸,收率70%。
2、4’-(4”-反式-丙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯
往250ml三口瓶中加入11.3g(0.04mol)4-(反式-4’-丙基环己基)-2,6-二氟-苯硼酸,9.0g(0.04mol)3,4-二氟-2-甲氧基溴苯,100ml苯,50ml无水乙醇,12g碳酸钠,4g水以及0.95g四(三苯基膦)合钯,加热到70℃下回流24小时后冷却至室温。分出有机相,用100ml×3三氯甲烷萃取水相,合并有机相后水洗至中性,用无水硫酸钠干燥。将干燥后的溶液旋蒸出去溶液,得到白色粗品13.9g,用无水乙醇重结晶,得到10.5g4’-(4”-反式-丙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯的白色晶体,收率69%。
DSC(差示扫描量热计):Cr 54.5℃N I
IR:波数/cm-1=3010,2958,2860,1865,1615,1585,1560,1486,1475,1420,1387,1315,1285,1238,1175,1128,1080,965,945,860,813,772,658,627,615,540
MS(m/z):380(M+),337,322,311,297,296,283,282,269,255,237,219,201,193,188,155,143,127,109,95,85,81,69,55,43
证明所得化合物正确。
用相同的方法可以得到:
4’-(4”-反式-甲基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-乙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-丁基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-戊基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-己基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-庚基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-辛基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-壬基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯,
4’-(4”-反式-癸基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯。
Claims (7)
2.根据权利要求1所述的烷基环己基多氟联苯衍生物,其特征在于:所述烷基环己基多氟联苯衍生物为:
4’-(4”-反式-戊基环己基)-3,4,2’-三氟-2-甲氧基联苯,
4’-(4”-反式-丙基环己基)-3,4,2’,6’-四氟-2-甲氧基联苯。
4.根据权利要求3所述的制备方法,其特征在于:步骤2)所述偶联反应的温度为60-90℃,反应溶剂为苯和无水乙醇。
6.根据权利要求5所述的制备方法,其特征在于:步骤2)所述偶联反应的反应温度为60-90℃,反应溶剂为苯和无水乙醇。
7.权利要求1-2任一所述的烷基环己基多氟联苯衍生物在制备液晶显示材料中的应用。
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