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Compound, preparation method of compound, liquid crystal composition and preparation method of composition

A liquid crystal composition and compound technology, which can be used in the production of hydrocarbons from oxygen-containing organic compounds, chemical instruments and methods, liquid crystal materials, etc., can solve the problems affecting the application range of liquid crystal displays, and achieve the effect of expanding the application range.

Active Publication Date: 2014-09-17
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The clearing point of existing liquid crystal compounds is generally around 100 degrees, relatively low, which seriously affects the application range of liquid crystal displays

Method used

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  • Compound, preparation method of compound, liquid crystal composition and preparation method of composition
  • Compound, preparation method of compound, liquid crystal composition and preparation method of composition
  • Compound, preparation method of compound, liquid crystal composition and preparation method of composition

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preparation example Construction

[0041] The embodiment of the present invention provides a kind of preparation method of above-mentioned compound, comprises the following steps:

[0042] Include the following steps:

[0043] step 1)

[0044] Compound P1-1 undergoes bromination reaction with bromine in tetrahydrofuran, and compound P1-2 is obtained after isolation;

[0045] The reaction formula is as follows:

[0046]

[0047] Step 2)

[0048] Compound P1-2 and propylmagnesium bromide are reacted in toluene to obtain compound P1-3 through tetrakistriphenylphosphopalladium catalyzed reaction; the reaction formula is as follows:

[0049]

[0050] step 3)

[0051] Compound P1-3 was subjected to bromination reaction with bromine in tetrahydrofuran, and compound P1-4 was obtained after isolation; the reaction formula is as follows:

[0052]

[0053] Step 4)

[0054] After compound P1-4 is made into Grignard reagent and Carry out addition reaction, then dehydration, reduction, generate compound P1; ...

Embodiment 1

[0074] This embodiment provides a compound and its preparation method.

[0075] The compound of present embodiment, its structural formula is as follows:

[0076]

[0077] This implementation also provides the above-mentioned compound and a preparation method thereof, comprising the following steps:

[0078] step 1)

[0079] Compound P1-1 was subjected to bromination reaction with bromine in tetrahydrofuran, and compound P1-2 was obtained after isolation; the reaction formula is as follows:

[0080]

[0081] Specifically, tetrahydrofuran is used as a solvent in this step, the molar ratio between bromine and compound P1-1 is 1.2:1, and the temperature range of the reaction is 17°C; the mixture after the bromination reaction is separated by extraction, wherein the extractant is tetrahydrofuran, stirring , stand still for 0.5 h, take the supernatant, and separate the tetrahydrofuran in the supernatant from the compound P1-1 by layering to obtain the compound P1-2.

[008...

Embodiment 2

[0097] This embodiment provides a compound and its preparation method.

[0098] The compound of present embodiment, its structural formula is as follows:

[0099]

[0100] This implementation also provides the above-mentioned compound and a preparation method thereof, comprising the following steps:

[0101] step 1)

[0102] Compound P1-1 was subjected to bromination reaction with bromine in tetrahydrofuran, and compound P1-2 was obtained after isolation; the reaction formula is as follows:

[0103]

[0104] Specifically, tetrahydrofuran is used as a solvent in this step, the molar ratio between bromine and compound P1-1 is 1:1, and the temperature range of the reaction is 23° C.; the mixture after the bromination reaction is separated by extraction, wherein the extractant is tetrahydrofuran, and stirring , stand still for 1 h, take the supernatant, and separate the tetrahydrofuran in the supernatant from the compound P1-1 by layering to obtain the compound P1-2.

[0...

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Abstract

The invention provides a compound, a preparation method of the compound, a liquid crystal composition, a preparation method of the composition, and a liquid crystal display panel. The invention aims to solve the problems of low clearing point and narrow application range of compounds, liquid crystal compositions and liquid crystal display panels in the prior art. The compound, the liquid crystal composition and the liquid crystal display panel make the clearing point in a range of 150-180DEG C, and greatly enlarge the application range of liquid crystal display devices.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a composition and a preparation method thereof, a liquid crystal composition and a preparation method thereof, and a liquid crystal display panel. Background technique [0002] Liquid crystal displays are now widely used in various aspects of social life. With the development of liquid crystal display technology, various liquid crystal compounds have been practically applied. Some general requirements for liquid crystal compounds, including phase transition temperature, optical anisotropy, dielectric anisotropy, viscosity, resistivity, etc., of liquid crystal compounds have a great influence on the final application of liquid crystal materials. It is extremely important to develop new liquid crystal compounds and their compositions to improve various properties of liquid crystals and improve the application effect of liquid crystal displays. [0003] The clearing po...

Claims

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Application Information

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IPC IPC(8): C07C13/66C07C1/22C09K19/44C09K19/32G02F1/1333
Inventor 田肖雄
Owner BOE TECH GRP CO LTD
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