Liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles and application of liquid crystal compound

A liquid crystal compound and compound technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor mutual solubility and easy precipitation of liquid crystal compounds

Pending Publication Date: 2021-09-07
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But also because of the existence of rigid oxyfluorene ring, this kind of alkyl-substituted liquid crystal compound has poor miscibility and is easy to precipitate at low temperature

Method used

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  • Liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles and application of liquid crystal compound
  • Liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles and application of liquid crystal compound
  • Liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles and application of liquid crystal compound

Examples

Experimental program
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Effect test

preparation example Construction

[0061] As the preparation method of the compound represented by the aforementioned formula I of the present invention, the following synthetic route is preferably adopted, and other similar structures can also be synthesized by this method.

[0062] Synthetic route 1

[0063] step 1:

[0064]

[0065] Step 2:

[0066]

[0067] Synthetic route 2

[0068] step 1:

[0069]

[0070] Step 2:

[0071]

[0072] The reactants and reagents used in the aforementioned synthetic route can all be purchased through commercial channels, and means such as the principles of such methods, operating procedures, conventional post-treatment, silica gel column, recrystallization and purification are well known to those skilled in the art. The synthesis process can be fully realized to obtain the target product.

[0073] The reactions in the aforementioned synthetic routes are all carried out in a solvent. As such a solvent, for example, a solvent selected from tetrahydrofuran, N,N-...

Embodiment 1

[0121] The preparation of the compound shown in the following formula I-a-1-1 of structural formula:

[0122]

[0123] Its preparation route is as follows:

[0124]

[0125] The specific operation process of preparation:

[0126] Step 1: Preparation of Intermediate 1

[0127] Throw 0.15mol of diisopropylamine and 0.3L of tetrahydrofuran into a 1L three-necked flask, cool down to 0°C, add 0.12mol of butyl lithium dropwise, keep warm at 0-5°C, and keep warm for half an hour; add 0.1L of 3,4-difluoro A solution of bromobenzene (0.1mol) in tetrahydrofuran was kept at -5-0°C for 1.5 hours, DMF (0.1mol) was added dropwise, and kept at -5-0°C for 2 hours. After the reaction is complete, add 500 mL of 1 mol / L dilute hydrochloric acid, let stand to separate the liquids, extract the water phase with 0.1 L×2 ethyl acetate, dry the liquid with anhydrous sodium sulfate, spin dry, dissolve 1 L of toluene and pass through the column, and evaporate the solvent to dryness. 18.8 g of t...

Embodiment 2

[0151] The preparation of the compound shown in the following formula I-a-9-1 of structural formula:

[0152]

[0153] Its preparation route is as follows:

[0154]

[0155] The specific operation process of preparation:

[0156] Step 1: Preparation of Intermediate 1

[0157] Using 1-(2-bromoethyl 1)-4-ethylbenzene and intermediate 2 of Example 1 as raw materials, refer to Step 3 of Example 1 to synthesize Intermediate 1.

[0158] Step 2: Preparation of Intermediate 2

[0159] Synthetic intermediate 2 in step 4 in reference example 1.

[0160] Step 3: Preparation of Intermediate 3

[0161] Synthetic intermediate 3 in step 10 of reference example 1.

[0162] Step 4: Preparation of Intermediate 4

[0163] Synthetic intermediate 4 in step 11 in reference example 1.

[0164] Step 5: Preparation of 1-a-9-1

[0165] The product 1-a-9-1 was synthesized with reference to step 12 in Example 1.

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PUM

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Abstract

The invention belongs to the field of liquid crystal compound materials, and relates to a liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles and application of the liquid crystal compound. The chemical structural formula is shown in the formula I. The liquid crystal compound and a liquid crystal composition containing the liquid crystal compound have the advantages of large dielectric, high clearing point, high refractive index, high K value and the like, and are suitable for displays in VA, ECB, PALC, FFS or IPS modes.

Description

technical field [0001] The invention belongs to the field of liquid crystal compound materials, and in particular relates to a liquid crystal compound containing dibenzothiophene and oxygen-containing heterocycles, a composition and an application. Background technique [0002] Since the Austrian scientist Leinitzer first synthesized liquid crystals in 1888, the real development of the liquid crystal industry has been in the past 30 years. Due to the obvious advantages of liquid crystal display materials, such as low driving voltage, small power consumption, and reliability High, large display information, color display, no flicker, can realize flat panel display, etc., liquid crystal monomers and liquid crystal displays have experienced tremendous development, liquid crystal monomers have now synthesized more than 10,000 kinds of liquid crystal materials, of which commonly used There are thousands of liquid crystal display materials, which are classified according to the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/34C09K19/44C09K19/46
CPCC09K19/3494C09K19/44C09K19/46
Inventor 邢杰浩王一平李明员国良张虎波王东梅李洪峰靳鹏程
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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