# US 9,434,682 B2 · Reactive mesogen compound having superior thermostability and high birefringence and method of preparing the same

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- Number: US 9,434,682 B2
- Document ID: US9434682B2
- Status: Granted
- Kind: B2
- Application number: 14/805,715
- Filed: 2015-07-22
- Published: 2015-12-17
- Granted: 2016-09-06
- Earliest claimed: 2013-01-23
- Assignees: Aekyung Chemical Co., Ltd.
- Applicants: Aekyung Chemical Co., Ltd.
- Inventors: Yoon-Tae Jeon; Do-Yeon Kim; Yun-Sun Do; Gi-Woo Lee; Hueong-Nam Park; Kwang-Sik Choi
- Web page: https://patentgrep.com/patent/US9434682B2

## CPC

- C07C 249/02: of compounds containing imino groups
- C07C 45/64: by introduction of functional groups containing oxygen only in singly bound form
- C07C 51/367: by introduction of functional groups containing oxygen only in singly bound form
- C07C 65/00: Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, [IMAGE cpc-sch-C07C-0958.gif] groups, [IMAGE cpc-sch-C07C-0959.gif] groups, or [IMAGE cpc-sch-C07C-0960.gif] groups (cyclic anhydrides C07D)
- C07C 67/40: by oxidation of primary alcohols
- C07C 219/14: having at least one of the hydroxy groups esterified by a carboxylic acid having the esterifying carboxyl group bound to a carbon atom of a six-membered aromatic ring
- C07D 309/12: only hydrogen atoms and one oxygen atom directly attached to ring carbon atoms, e.g. tetrahydropyranyl ethers
- C09K 19/062: {containing one non-condensed benzene ring}
- C09K 19/2014: {containing additionally a linking group other than -COO- or -OCO-, e.g. -CH2-CH2-, -CH=CH-, -C=C-; containing at least one additional carbon atom in the chain containing -COO- or -OCO- groups, e.g. -(CH2)m-COO-(CH2)n-}
- C09K 19/22: linked by a chain containing carbon and nitrogen atoms as chain links, e.g. Schiff bases
- C09K 19/38: Polymers
- C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Disclosed are a novel reactive mesogen compound having superior thermostability, high birefringence and a simple preparation process while possessing unique liquid crystal characteristics having molecular orientation by forming a polymer network through photopolymerization, and a method of preparing the same. The novel reactive mesogen compound according to the present invention is represented by Formula 3 below.

## Claims

### Claim 1

A method of preparing a reactive mesogen compound of Formula 3, the method comprising: preparing a compound of Formula 4 below; preparing a compound of Formula 5 below from the compound of Formula 4 below; preparing a compound of Formula 6 below; preparing a compound of Formula 7 below from the compound of Formula 6 below; preparing a compound of Formula 8 below from the compound of Formula 7 below; preparing a compound of Formula 9 below by reacting the compound of Formula 5 below and a compound of Formula 8 below; preparing a compound of Formula 10 below compound from the compound of Formula 9 below; and preparing the compound of Formula 3 below from the compound of Formula 10 below:

### Claim 2 (depends on 1)

The method according to claim 1, wherein the compound of Formula 5 is prepared by reacting through dropping an acryloyl chloride solution diluted in tetrahydrofuran (THF) into a mix solution of the compound of Formula 4, triethylamine (TEA) and methylene chloride (MC).

### Claim 3 (depends on 1)

The method according to claim 1, wherein the compound of Formula 8 is prepared by reacting at 100° C. while stirring a mix solution of the compound of Formula 7, aminophenol (4-aminophenol), dimethylacetamide (DMAC) and ethylacetate (EAc).