Compound and preparation method thereof

A compound, alkenylation technology, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, organic chemistry, etc., can solve the problems of unsuitability for industrial production, complicated synthesis processes, and high production costs, and achieves simple post-processing steps and can be used. Strong controllability and the effect of reducing power consumption

Inactive Publication Date: 2016-11-23
BEIJING SINEVA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a kind of compound in order to solve existing liquid crystal compound to have high rotational viscosity γ in the prior art 1 And / or the defect problem of lower anisotropy △ε; provide a preparation method of the compound to solve the existing problems in the prior art such as complex synthesis process, unsuitable for industrial production, low yield and high production cost

Method used

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  • Compound and preparation method thereof
  • Compound and preparation method thereof
  • Compound and preparation method thereof

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Embodiment approach

[0061] According to one embodiment of the present invention, the compound is:

[0062]

[0063] According to one embodiment of the present invention, the compound is:

[0064]

[0065] According to one embodiment of the present invention, the compound is:

[0066]

[0067] According to one embodiment of the present invention, the compound is:

[0068]

[0069] According to one embodiment of the present invention, the compound is:

[0070]

[0071] According to one embodiment of the present invention, the compound is:

[0072]

[0073] According to one embodiment of the present invention, the compound is:

[0074]

[0075] According to one embodiment of the present invention, R 1 Selected from: hydrogen, straight-chain alkyl with 1-10 carbon atoms or straight-chain alkoxy with 1-10 carbon atoms; R 2 Selected from: Hydrogen, Cl, F, CN, OCF 3 、CF 3 ,, SCN, CHF 2 、OCHF 2 , a straight-chain alkyl group with 1-10 carbon atoms or a straight-chain alkoxy ...

Embodiment 1

[0102] according to figure 1 In the flow chart of the preparation method shown, first enter the coupling step S1100: dissolve 1eq reactant 1-a-1 and 1eq reactant 1-b-1 in the solvent, add 1eq sodium bicarbonate, and add the amount of catalyst under nitrogen protection Tetrakis(triphenylphosphine)palladium, heated to reflux and stirred for 2h, then extracted after cooling down to room temperature, and passed through a silica gel column to obtain compound 2-a-1, wherein the solvent was a mixed solvent of toluene, ethanol and water, toluene, ethanol and The volume ratio of water is 1:3:3, and the total volume is adjusted according to the amount of reactant 1-a-1. Generally, 1g of reactant 1-a-1 corresponds to 10ml of solvent. The catalyst is preferably tetrakis(triphenylphosphine) For palladium, toluene is preferred as the extraction agent during extraction, and toluene is preferred for elution through a silica gel column, and the obtained 2-a-1 is a white solid with a yield of 9...

Embodiment 2

[0107] according to figure 1 Show the flow chart of the preparation method, first enter the coupling step S1100: dissolve 1eq reactant 1-a-1 and 1.2eq reactant 1-b-1 in the solvent, add 3eq sodium bicarbonate, and add the catalyst under nitrogen protection A certain amount of tetrakis(triphenylphosphine) palladium was heated to reflux and stirred for 4h, then extracted after cooling down to room temperature, and passed through a silica gel column to obtain compound 2-a-1, wherein the solvent was a mixed solvent of toluene, ethanol and water, toluene, ethanol The volume ratio with water is 4:3:3, and the total volume is adjusted according to the amount of reactant 1-a-1. Generally, 1 gram of reactant 1-a-1 corresponds to 10ml of solvent. The catalyst is preferably tetrakis(triphenyl Phosphine) palladium, toluene is preferably used as the extractant during extraction, and toluene is preferably used for elution through a silica gel column, and the obtained 2-a-1 is a white solid ...

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Abstract

The invention discloses a compound and a preparation method thereof. The compound is shown as the formula I (please see the formula I in the description. The preparation method of the compound comprises the steps of coupling, wherein a compound 1-a and a compound 1-b are coupled and converted into a compound 2-a; reducing, wherein the ester group of the compound 2-a is reduced into a formyl group, and the compound is converted into a compound 3-a; alkenylation, wherein the compound 3-a and a compound 3-b react to be converted into a compound 4-a, and 1-a, 1-b, 2-a, 3-a, 3-b and 4-a are shown below (please see the formulas in the description. The compound has low rotary viscosity gamma 1 and high dielectric anisotropy delta epsilon. The preparation method of the compound is simple in step, mild in condition, high in controllability, high in yield, simple in aftertreatment and suitable for industrial production.

Description

technical field [0001] The invention relates to the field of liquid crystal compounds, in particular to a compound and a preparation method thereof. Background technique [0002] In recent years, the market in the liquid crystal display field has become very large, and the technology has become increasingly mature, but at the same time, the requirements for display quality are also increasing. In particular, it is required to achieve fast response and reduce driving voltage to reduce power consumption. Liquid crystal materials are one of the important optoelectronic materials of liquid crystal displays, which play an important role in improving the performance of liquid crystal displays. Therefore, liquid crystal materials have been greatly developed and a large number of liquid crystal compounds have appeared, ranging from biphenylnitrile, esters, oxygen-containing heterocycles , pyrimidine ring liquid crystal compounds have developed to cyclohexylbenzene, phenylacetylene, ...

Claims

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Application Information

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IPC IPC(8): C07C25/24C07C17/263C09K19/30
Inventor郭林林姜坤洪豪志
OwnerBEIJING SINEVA TECH