Liquid crystal alignment agent, liquid crystal alignment film and liquid crystal display element
A technology of liquid crystal alignment agent and carbon number, which is applied in liquid crystal materials, instruments, organic chemistry, etc., and can solve problems such as reduced reliability, failure to obtain a good alignment state, and reduced reliability of liquid crystal display components.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0240] The present invention will be further specifically described below using examples, but the present invention is not limited by these examples.
[0241]
Synthetic example 1
[0242] (Synthesis Example 1) 2-(2-(2,4-diaminophenoxy)ethyl)-4,5,6,7-tetrahydro-1H-isoindole-1,3-(2H)- Synthesis of diketones
[0243]
[0244] The first step: Synthesis of N-(2-hydroxyethyl)-2,3,4,5-tetrahydrophthalimide.
[0245] In a 500ml four-neck flask, a stirring bar, a nitrogen gas introduction tube, and a Dean-Stark device were set, and 1-cyclohexene-1,2-dicarboxylic anhydride (50.00g: 328.6mmol) was weighed, and 500g of toluene was added, It heated and stirred at 50 degreeC in nitrogen atmosphere, and dissolved it. Next, 2-ethanolamine (20.0 g: 328.6 mmol) was slowly added, and after stirring for 30 minutes, the temperature was raised to 120° C., and the mixture was refluxed for 6 hours to remove generated water to perform a dehydration reaction.
[0246] After completion of the reaction, 200 g of ethyl acetate was added, and the organic phase was washed with 300 ml of potassium carbonate aqueous solution (10%), 300 ml of pure water, and 300 ml of saturated brin...
Synthetic example 2
[0254] (Synthesis Example 2) Synthesis of 2-(2-(2,4-diaminophenoxy)ethyl)isoindole-1,3-dione
[0255]
[0256] The first step: Synthesis of 2-(2,4-dinitrophenoxy)bromoethane
[0257] Install a stirring bar, a nitrogen inlet tube, and a reflux tube on a 500ml four-neck flask, weigh 2,4-dinitrofluorobenzene (50.0g: 268.73mmol), 2-bromoethanol (41.7g: 322.4mmol), add THF300g and triethylamine (32.6 g: 322.4 mmol), and reacted at 60° C. for 24 hours under a nitrogen atmosphere.
[0258] After completion of the reaction, 200 g of ethyl acetate was added to the reaction solution, and the organic phase was washed three times with 300 g of pure water and 300 g of saturated brine, and dried over anhydrous magnesium sulfate.
[0259] Filter, remove the solvent using a rotary evaporator, and purify by using silica gel through a flash column (developing solvent: ethyl acetate / N-hexane=5:1) to obtain a light orange viscous body (72.74g: yield 92%).
[0260] Second step: Synthesis of ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More