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Liquid crystal compound containing 1,4-dioxane and pentafluoro-allyloxy structure and liquid crystal composition thereof

A technology of pentafluoroallyloxy and liquid crystal compounds, applied in liquid crystal materials, organic chemistry, chemical instruments and methods, etc.

Active Publication Date: 2014-05-07
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are patents related to pentafluoroallyloxy and 1,4-dioxane structural derivatives as liquid crystal compounds, but there are no reports of liquid crystal compounds with two functional groups coexisting with difluoromethoxy. Therefore, there are The need to develop new liquid crystal compounds containing 1,4-dioxane and pentafluoroallyloxy structures

Method used

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  • Liquid crystal compound containing 1,4-dioxane and pentafluoro-allyloxy structure and liquid crystal composition thereof
  • Liquid crystal compound containing 1,4-dioxane and pentafluoro-allyloxy structure and liquid crystal composition thereof
  • Liquid crystal compound containing 1,4-dioxane and pentafluoro-allyloxy structure and liquid crystal composition thereof

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Experimental program
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Effect test

Embodiment 1

[0065] BYLC-01

[0066] The synthetic route for preparing compound BYLC-01 is as follows:

[0067]

[0068] Synthesis of Step 1-1 Compound 3

[0069] Add 40g (0.338mol) of compound 1, 50g (0.354mol) of compound 2, 2.8g of p-toluenesulfonic acid, 1.0g of 2,6-di-tert-butyl-p-cresol, 0.2L of toluene into a 500ml three-necked flask with a water separator , start stirring, heat up to 125°C to reflux and divide the water, after timing the reaction for 8 hours, pour the reaction solution into 500ml of water, stir, separate the liquids, extract the water phase with toluene, wash the organic phase three times with water, separate the liquids, and combine all the organic phases Dry with anhydrous sodium sulfate for 0.5h, filter with suction, combine the filtrates to concentrate and dry the solvent, add 4 times of petroleum ether to dissolve through a silica gel column, concentrate and dry, add 2 times of ethanol to dissolve and recrystallize, and filter with suction to obtain 61.5...

Embodiment 2

[0081] BYLC-02

[0082] The synthetic route for preparing compound BYLC-02 is as follows:

[0083]

[0084] Synthesis of Step 1-1 Compound 3

[0085] Add 80g (0.4mol) of compound 1, 85g (0.598mol) of compound 2, 4.5g of p-toluenesulfonic acid, 2.0g of 2,6-di-tert-butyl-p-cresol, 0.2L of toluene into a 500ml three-necked flask with a water separation device , start stirring, heat up to 125°C to reflux and divide the water, after timing the reaction for 10 hours, pour the reaction solution into water, stir, separate the liquids, extract the water phase with toluene, combine the organic phases and wash them three times, and dry the organic phases with anhydrous sodium sulfate 0.5h, suction filtration, combined filtrate concentrated dry solvent, added 4 times petroleum ether to dissolve through silica gel column, concentrated dried, added 2 times ethanol for recrystallization, obtained 93g light yellow solid compound 3, GC: 99.43%, yield: 71.7% .

[0086] Synthesis of step...

Embodiment 3

[0097] BYLC-03

[0098] The synthetic route for preparing compound BYLC-03 is as follows:

[0099]

[0100] Synthesis of Step 1-1 Compound 3

[0101] Add 50g (0.423mol) of compound 1, 92.3g (0.423mol) of compound 2, 4.2g, p-toluenesulfonic acid, 1.8g of 2,6-di-tert-butyl-p-cresol, 0.2L into a 500ml three-necked flask with a water separation device Toluene, start stirring, heat up to 125°C to reflux and divide water, time the reaction for 5 hours, pour the reaction solution into water, stir, separate the liquid, extract the water phase with toluene, combine the organic phase and wash three times with water, and use anhydrous sodium sulfate for the organic phase Dry for 0.5h, filter with suction, combine the filtrates to concentrate and dry the solvent, add 4 times of petroleum ether to dissolve through a silica gel column, concentrate and dry, add 2 times of ethanol for recrystallization, and obtain 101.2g of light yellow solid compound 3, GC: 99.43%, yield: 75.3%.

[0...

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PUM

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Abstract

The invention discloses a compound for a liquid crystal medium component. The compound is shown in the structure formula described in the specification. The liquid crystal composition containing the compound has the advantages of short response time, moderate delta n, high charge retention rate, low threshold voltage and wide application prospect.

Description

technical field [0001] The present invention relates to a liquid crystal compound and a liquid crystal composition comprising the liquid crystal compound, more specifically, the present invention relates to a novel liquid crystal compound containing 1,4-dioxane and pentafluoroallyloxy structures and A liquid crystal composition comprising the liquid crystal compound. Background technique [0002] In recent years, the application fields of liquid crystal compounds have become wider and wider, and have been widely used in various types of display devices, electro-optical devices, sensors, and the like. Among them, nematic liquid crystals have the widest application in display devices. Nematic liquid crystals have been widely used in passive TN or STN matrix displays and systems with TFT active matrices. [0003] Liquid crystal materials require good chemical and thermal stability, good stability to electric field and electromagnetic radiation, wide temperature range of nemat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/34C07D319/06C09K19/44G02F1/1333
Inventor 姜天孟高立龙田会强杭德余班全志梁现丽陈海光储士红
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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