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A liquid crystal compound containing pentafluoropropene and pyran ring and its liquid crystal composition

A pentafluoropropene and compound technology, applied in liquid crystal materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of small dielectric anisotropy, large rotational viscosity, slow response speed, etc., and achieve dielectric anisotropy. Large, fast response, small rotating sticky effect

Active Publication Date: 2016-02-10
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patents such as WO2006 / 061966, WO2006 / 132015, JP2005-15775 and JP2007-277127 have involved derivatives containing pentafluoropropylene structure as liquid crystal compounds, but they all have small dielectric anisotropy, slow response speed, high rotational viscosity, etc. shortcoming

Method used

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  • A liquid crystal compound containing pentafluoropropene and pyran ring and its liquid crystal composition
  • A liquid crystal compound containing pentafluoropropene and pyran ring and its liquid crystal composition
  • A liquid crystal compound containing pentafluoropropene and pyran ring and its liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] BYLC-01

[0065] The synthetic route for the preparation of compound BYLC-01 is shown below:

[0066]

[0067] Synthesis of Compounds 1-2

[0068] Add 66.8g of magnesium chips (4.046mol) and 100ml of tetrahydrofuran into a 2L three-necked flask, heat up to reflux, add a small amount of solution consisting of 488g of 3,5-difluorobromobenzene (4.046mol) and 1000ml of tetrahydrofuran dropwise to initiate a reaction, under reflux The remaining solution of 3,5-difluorobromobenzene in tetrahydrofuran was added dropwise, the dropping was completed, and the reaction was carried out at 50 degrees for 0.5 hours to obtain Grignard reagent 1-1.

[0069] Add 287g (2.023mol) of propylpyranone and 750ml of tetrahydrofuran to a 5L three-necked flask, cool down to -30°C with liquid nitrogen, and add the prepared Grignard reagent 1-1 (4.046mol) dropwise under temperature control to -30°C. , the temperature was controlled at -30 °C and reacted for 1 hour, and then the temperature w...

Embodiment 2

[0087] BYLC-02

[0088]The synthetic route for the preparation of compound BYLC-02 is shown below:

[0089]

[0090] Synthesis of Compound 2-2

[0091] Add 66.8g of magnesium chips (4.335mol) and 100ml of tetrahydrofuran to a 2L three-necked flask, heat up to reflux, add a small amount of a solution consisting of 488g of 3,5-difluorobromobenzene (2.89mol) and 1000ml of tetrahydrofuran dropwise to initiate a reaction, under reflux The remaining solution of 3,5-difluorobromobenzene in tetrahydrofuran was added dropwise, the dropping was completed, and the reaction was carried out at 60 degrees for 5 hours to obtain Grignard reagent 2-1.

[0092] Add 287g (2.023mol) of propylpyranone and 750ml of tetrahydrofuran to a 5L three-necked flask, cool down to -35°C with liquid nitrogen, and add the prepared Grignard reagent 2-1 (2.89mol) dropwise at a temperature controlled to -35°C. , the temperature is controlled at -35 °C and reacted for 5 hours, and then the temperature is na...

Embodiment 3

[0110] BYLC-03

[0111] The synthetic route for the preparation of compound BYLC-03 is shown below:

[0112]

[0113] Synthesis of compound 3-2

[0114] Add 66.8g of magnesium chips (4.046mol) and 100ml of tetrahydrofuran into a 2L three-necked flask, heat up to reflux, add a small amount of solution consisting of 488g of 3,5-difluorobromobenzene (2.023mol) and 1000ml of tetrahydrofuran dropwise to initiate a reaction, and under reflux The remaining solution of 3,5-difluorobromobenzene in tetrahydrofuran was added dropwise, the dropping was completed, and the reaction was carried out at 65 degrees for 10 hours to obtain Grignard reagent 3-1.

[0115] Add 287g (2.023mol) of propylpyranone and 750ml of tetrahydrofuran into a 5L three-necked flask, cool down to -40°C with liquid nitrogen, and add the prepared Grignard reagent 3-1 (2.023mol) dropwise under temperature control to -40°C. , the temperature is controlled at -40 °C and reacted for 10 hours, and then the temperat...

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PUM

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Abstract

The invention discloses a liquid crystal compound containing pentafluoropropene and a pyranoid ring. The liquid crystal compound has the following structure formula described in the specification. The liquid crystal compound can be applied to modes of TN (Transition Network), IPS (Intrusion Prevention System), FFS (Formatted File System), and ADS-TFT (Acad Develop system-Thin Film Transistor). A liquid composition added with the liquid crystal compound has the advantages of shorter response time, moderate delta n numerical value, higher charge retention rate, and lower threshold voltage, and wide application prospect.

Description

technical field [0001] The present invention relates to the field of liquid crystal materials, in particular to a liquid crystal compound and a liquid crystal composition comprising the liquid crystal compound, more particularly, the present invention relates to a novel liquid crystal compound containing pentafluoropropene and a pyran ring structure and a liquid crystal compound comprising A liquid crystal composition of 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 stabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D309/06C07D309/08C07D309/10C09K19/34
CPCC07D309/06C07D309/08C07D309/10C09K19/3402
Inventor 姜天孟班全志杭德余田会强高立龙梁现丽陈海光储士红
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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