Fluorine-containing dibenzothiophene sulfone single liquid crystal and preparation method and applications thereof
A technology of thiophene sulfone and monomer, which is applied in the field of fluorine-containing dibenzothiophene sulfone monomer liquid crystal and its preparation, can solve the problems of high threshold voltage and insufficient dielectric constant of fluorine-containing liquid crystal materials, and improve the clearing point, Effect of large anisotropy, dielectric constant, and property improvement
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 13
[0032] Synthesis of embodiment 13,7-bis(2,3-difluoro-4-pentyl-phenyl)-dibenzothiophene sulfone
[0033] In a 500ml three-necked round-bottom flask protected by nitrogen, add 5.6g (0.015mol) 3,7-dibromo-dibenzothiophene sulfone, 7.5g (0.033nol) 2,3-difluoro-4-pentyl- Phenylboronic acid, 10.4g (0.075mol) of potassium carbonate, 112g of tetrahydrofuran, 31.2g of water, 0.087g (0.000075mol) of tetrakis(triphenylphosphine)palladium, heated and refluxed for 2 hours to obtain a pale yellow solution, cooled, and stirred with 200g of toluene After 0.5 hours, separate layers, wash the organic phase with water, dry over anhydrous sodium sulfate, remove the desiccant, remove the solvent under reduced pressure with a rotary evaporator to obtain 9 g of light yellow solid, and recrystallize the product with toluene to obtain 7.9 g of white crystal, Y: 90.8 %. The purity tested by gas chromatography is 99.9%, and the phase transition point is tested by differential scanning calorimeter (DSC)...
Embodiment 23
[0034] Synthesis of Example 23,7-bis(2-fluoro-4-propyl-phenyl)-dibenzothiophene sulfone
[0035] In a 500ml three-necked round-bottomed flask protected by nitrogen, add 5.6g (0.015mol) 3,7-dibromo-dibenzothiophene sulfone, 6.3g (0.030nol) 2-fluoro-4-propyl-phenylboronic acid, 1.2g (0.030mol) sodium hydroxide, 16.8g toluene, 25.6g water, 0.000336g (0.0000015mol) tetrakis (triphenylphosphine) palladium, heat and reflux for 1 hour to obtain a light yellow solution, cool, add 200g toluene and stir for 0.5 Hours, separate layers, wash the organic phase with water, dry over anhydrous sodium sulfate, remove the desiccant, remove the solvent under reduced pressure with a rotary evaporator to obtain 8 g of light yellow solid, and recrystallize the product with toluene to obtain 6.1 g of white crystal, Y: 90.5% . The purity tested by gas chromatography is 99.7%, and the phase transition point is tested by differential scanning calorimeter (DSC) and microscope: crystal phase (Cr) to nem...
Embodiment 33
[0036] Synthesis of Example 33,7-bis(2-fluoro-4-butyl-phenyl)-dibenzothiophene sulfone
[0037] In a 500ml three-neck round-bottomed flask protected by nitrogen, add 5.6g (0.015mol) 3,7-dibromo-dibenzothiophene sulfone, 10.26g (0.045nol) 2,3-difluoro-4-pentyl- Phenylboronic acid, 12g (0.12mol) potassium bicarbonate, 56g petroleum ether, 45g water, 0.05895g (0.00015mol) dichlorodiphenylphosphine palladium, heated and refluxed for 5 hours to obtain a light yellow solution, cooled, added 300g toluene and stirred for 1.5 Hours, separate layers, wash the organic phase with water, dry over anhydrous sodium sulfate, remove the desiccant, and remove the solvent under reduced pressure with a rotary evaporator to obtain 12g of a light yellow solid. The product is recrystallized with toluene to obtain 10.8g of white crystals, Y: 90.9% . The purity tested by gas chromatography is 99.7%, and the phase transition point is tested by differential scanning calorimeter (DSC) and microscope: cr...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com