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Liquid crystal compound containing methylbenzene and difluoro methyleneoxy linking group and preparing method and application thereof

A technology of difluoromethyleneoxy and liquid crystal compounds, applied in chemical instruments and methods, ether preparation, organic chemistry, etc., can solve problems such as clearing point drop, and achieve a wide range of applications

Inactive Publication Date: 2015-12-09
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is to provide a liquid crystal compound containing methylbenzene and a difluoromethyleneoxy linking group and its preparation method and application, so as to improve the existing liquid crystal compound with difluoromethyleneoxy The existing problem of clearing point drop improves the response speed of the liquid crystal mixture

Method used

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  • Liquid crystal compound containing methylbenzene and difluoro methyleneoxy linking group and preparing method and application thereof
  • Liquid crystal compound containing methylbenzene and difluoro methyleneoxy linking group and preparing method and application thereof
  • Liquid crystal compound containing methylbenzene and difluoro methyleneoxy linking group and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Preparation of liquid crystal compounds shown in formula I-1-4-1, the structural formula is as follows,

[0100]

[0101] The synthetic route is,

[0102]

[0103] Specifically include the following two steps 1-a) and 1-b),

[0104] 1-a) 229g (0.83mol) raw material Dissolve in 1.5L toluene, add 108g (1mol) The temperature was raised to 60°C under stirring, and 150 g (1 mol) of trifluoromethanesulfonic acid (CF 3 SO 3 H), heat up to reflux after adding, divide water, reflux reaction for 12 hours, lower the temperature, evaporate toluene to dryness, add 1L methyl tert-butyl ether for washing, and suction filter to obtain 250g product Yield 50%.

[0105] 1-b) 240g (0.48mol) of the obtained step 1-a) Dissolve it with 1L of dichloromethane, lower the temperature to -75°C under the protection of an inert gas, and add 97g (0.96mol) triethylamine and 88g (0.5mol) triethylamine dropwise. 1L of dichloromethane solution, add 1 hour after insulation reaction, dropwi...

Embodiment 2

[0107] Preparation of liquid crystal compounds shown in formula I-1-14-1, the structural formula is as follows,

[0108]

[0109] The synthetic route is,

[0110]

[0111] Specifically include the following two steps 2-a) and 2-b),

[0112] 2-a) Will Alternative embodiment 1 step 1-a) in get the product

[0113] 2-b) Will Alternative embodiment 1 step 1-b) in Will replace get target product GC: 99.82%.

Embodiment 3

[0115] Preparation of liquid crystal compounds shown in formula I-2-3-1, the structural formula is as follows,

[0116]

[0117] The synthetic route is,

[0118]

[0119] Specifically include the following two steps 3-a) and 3-b),

[0120] 3-a) Will Alternative embodiment 1 step 1-a) in get the product

[0121] b) will Alternative embodiment 1 step 1-b) in get target product GC: 99.85%.

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Abstract

The invention discloses a liquid crystal compound containing methylbenzene and a difluoro methyleneoxy linking group and a preparing method and application thereof. The compound is shown as the formula I. According to the molecular structure of the compound in the formula I, the liquid crystal compound containing the methylbenzene and the difluoro methyleneoxy (-CF2O-) linking group is high in dielectric anisotropy and has low viscosity and excellent low-temperature intersolubility more importantly, and the performance is of great significance in liquid crystal compound blending.

Description

technical field [0001] The invention relates to the field of preparation and application of liquid crystal compounds, in particular to a liquid crystal compound containing methylbenzene and a difluoromethyleneoxy linking group, a preparation method and application thereof. Background technique [0002] At present, the application range of liquid crystal compounds is expanding more and more widely, and it can be applied to various types of displays, electro-optic devices, sensors, and the like. There are various types of liquid crystal compounds used in the above-mentioned display fields, among which nematic liquid crystals are most widely used. Nematic liquid crystals have been used in passive TN, STN matrix displays and systems with TFT active matrix. [0003] For the application field of thin film transistor technology (TFT-LCD), although the market has been huge in recent years and the technology has gradually matured, people's requirements for display technology are als...

Claims

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Application Information

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IPC IPC(8): C07C43/225C07C41/01C07D309/06C07D319/06C07D339/08C09K19/44C09K19/34C09K19/30C09K19/20
CPCC07C43/225C07C41/01C07D309/06C07D319/06C07D339/08C09K19/20C09K19/30C09K19/34C09K19/44C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016C09K2019/3422
Inventor 李明尚洪勇孟劲松员国良王瑾张虎波张芳苗
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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