Novel LCD compound p-n-hexyloxy cinnamic acid -2-fluoro-4-hydroxy- benzonitrile ester and its preparation method

A technology of n-hexyloxyl and liquid crystal compounds, which is applied in the field of replacing cinnamate organic liquid crystal compounds and its preparation, can solve the problems of low viscosity and low working voltage, and achieve high clearing point, wide liquid crystal range and stable chemical properties Effect

Inactive Publication Date: 2006-02-08
QINGDAO UNIV OF SCI & TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been many reports on liquid crystal materials, not all of them are suitable for use in display devices, because liquid crystal materials for display must meet a wide operating temperature range, low operating voltage, low viscosity, fast response, high Stability and other requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel LCD compound p-n-hexyloxy cinnamic acid -2-fluoro-4-hydroxy- benzonitrile ester and its preparation method
  • Novel LCD compound p-n-hexyloxy cinnamic acid -2-fluoro-4-hydroxy- benzonitrile ester and its preparation method
  • Novel LCD compound p-n-hexyloxy cinnamic acid -2-fluoro-4-hydroxy- benzonitrile ester and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Dissolve 0.01mol of p-hydroxycinnamic acid and 0.02mol of potassium hydroxide in 40ml of 95% (volume fraction) ethanol, then add 0.03mol of n-bromohexane dropwise at a rate of about 1ml / min, reflux for 24 hours, and then add 0.02mol potassium hydroxide in 70% (volume fraction) ethanol solution is 14ml, continue to reflux for 2h. Add 100ml of water, 20ml of concentrated hydrochloric acid, heat for 15min, cool and filter, wash with distilled water, dry, and recrystallize with 95% (volume fraction) ethanol to obtain p-hexyloxycinnamic acid as white flaky crystals with a yield of 54 %.

[0017] 2) Add 0.01mol of p-hexyloxycinnamic acid and 20ml of anhydrous tetrahydrofuran into a three-necked flask, stir to dissolve it completely, then add 0.01mol of DCC (N,N-Dicordecylcarbodiimide) until turbidity appears After the phenomenon, 0.01mol2-fluoro-4-hydroxybenzonitrile and a small amount of DMAP[4-(N,N-dimethylamino)pyridine] were dissolved in 20ml of anhydrous tetrahydrofu...

Embodiment 2

[0019] 1) Dissolve 0.02mol of p-hydroxycinnamic acid and 0.05mol of potassium hydroxide in 100ml of 95% (volume fraction) ethanol, then add 0.03mol of n-bromohexane, and reflux for 48h. Then add 35ml of 70% (volume fraction) ethanol solution of 0.03mol potassium hydroxide, and continue to reflux for 2h. Add 100ml of water and 40ml of concentrated hydrochloric acid, mix well, heat for 20min, cool and filter, wash with distilled water, dry, and then recrystallize with 95% (volume fraction) ethanol to obtain p-hexyloxycinnamic acid as white flaky crystals, Yield 49%.

[0020] 2) Add 0.015mol of p-hexyloxycinnamic acid and 50ml of anhydrous tetrahydrofuran into a three-necked flask, stir to dissolve completely, then add 0.01mol of DCC (N,N-dicyclohexylcarbodiimide) until turbidity appears After the phenomenon, 0.015mol2-fluoro-4-hydroxybenzonitrile and a small amount of DMAP[4-(N,N-dimethylamino)pyridine] were completely dissolved in 35ml of anhydrous tetrahydrofuran to form a so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a fluorocyano-containing cinnamic ester liquid crystal compound and its preparing process, wherein the chemical structure of the compound is p-orthohexoxyl cinnamic acid-2-fluoro-4-hydroxybenzene nitrile ester, The preparation process comprises introducing alkoxy to 4-position of cinnamic acid (3-phenylacrylic acid) through Williamson etherification reaction, then carrying out DCC dehydration condensation, so as to make the substituted cinnamic acid and 2-fluoro-4-hydroxybenzene nitrile condense and produce needed compound. The invention also discloses the use of the compound, which can be used in not only mixed liquid crystal, but also in various LCDs.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a substituted cinnamate organic liquid crystal compound containing a fluorine atom and a cyano group, a preparation method and an application thereof. Background technique [0002] In recent years, liquid crystal compounds and liquid crystal materials have become one of the hot spots in the research of applied chemistry and material chemistry, and have been widely used in electronics, optics, acoustics, bioengineering, chemical industry, etc., and the most extensive and important It is its application in electronic display. With the development of the information industry, the requirements for liquid crystal materials are constantly increasing. Although there have been many reports on liquid crystal materials, not all of them are suitable for use in display devices, because liquid crystal materials for display must meet a wide operating temperature range, low operating...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C255/50C09K19/16G02F1/13
Inventor 张书圣任锐李强黄学青宋修艳
Owner QINGDAO UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap