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A kind of benzofuran polymerizable compound and its application
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A technology of benzofuran and compound is applied in the field of benzofuran polymerizable compounds, and can solve the problems of poor uniformity of polymerizable components, short UV sensitivity wavelength and the like
Active Publication Date: 2021-05-25
BEIJING BAYI SPACE LCD MATERIALS TECH
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Problems solved by technology
So far, due to the problem that the polymerizable unit is too short for the UV sensitivitywavelength, or there is no or insufficient tilt angle after illumination, or the homogeneity of the polymerizable component is poor after illumination
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[0046] The synthetic route for preparing compound BYLC-01 is as follows:
[0047]
[0048] Specific steps are as follows:
[0049] (1) Synthesis of compound BYLC-01-1:
[0050] Add 40g to the reaction bottle 14.0g of anhydrouspotassiumcarbonate, 200ml of toluene, 150ml of ethanol, 150ml of water, 0.3g of tetrakistriphenylphosphine palladium, heated to reflux for 8h, and carried out conventional post-treatment to obtain 45.1g of off-white solid (compound BYLC-01-1) , HPLC: 99.7%, yield 87.1%;
[0051] (2) Synthesis of compound BYLC-01-2:
[0052] Add 45.1 g of compound BYLC-01-1, 6 g of NaOH, and 400 ml of deionized water into the reaction flask, and stir at room temperature for 2 h. After acidification with hydrochloric acid, conventional post-treatment was carried out to obtain a white solid (compound BYLC-01-2), 43.1 g, HPLC: 99.8%, yield 95.8%
[0060] The synthetic route for preparing compound BYLC-02 is as follows:
[0061]
[0062] Specific steps are as follows:
[0063] Synthesis of compound BYLC-02:
[0064] Under the protection of nitrogen, add 45.0g of compound BYLC-01-2, 32.5g of triethylamine and 250mL of methylenechloride into the reaction flask, cool down to -10°C, control the temperature from -10°C to 0°C, and add 28.0g of acryloyl chloride dropwise, Rise to room temperature and react for 6 hours. Pour the reaction solution into water, neutralize it with aqueous uraniumbicarbonate solution, perform conventional post-treatment, purify by chromatography, elute with n-hexane, and recrystallize from ethanol to obtain 39.3 g of a white solid (compound BYLC-02), LC : 99.8%, yield: 84.5%.
[0065] The obtained white solid BYLC-02 was analyzed by GC-MS, and the m / z of the product was 480.1 (M+).
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technical field [0001] The invention belongs to the technical field of liquid crystal materials, and relates to a benzofuran polymerizable compound and an application thereof. Background technique [0002] In recent years, liquid crystal display devices have been widely used in various electronic devices such as smartphones, tablet computers, car navigation systems, televisions, and the like. Representative liquid crystal displaymodes include twisted nematic (TN) type, super twisted nematic (STN) type, in-plane switching (IPS) type, fringe field switching (FFS) type and vertical alignment (VA) type. Among them, the VA mode has attracted more and more attention due to its fast fall time, high contrast, wide viewing angle, and high-quality images. [0003] However, the liquid crystal medium used in the display elements of the active matrixaddressing mode such as VA mode has its own shortcomings, such as the afterimage level is obviously worse than that of the display elemen...
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