JPS60158157A - Fluorohydroxybenzoic acid derivative - Google Patents

Fluorohydroxybenzoic acid derivative

Info

Publication number
JPS60158157A
JPS60158157A JP1476784A JP1476784A JPS60158157A JP S60158157 A JPS60158157 A JP S60158157A JP 1476784 A JP1476784 A JP 1476784A JP 1476784 A JP1476784 A JP 1476784A JP S60158157 A JPS60158157 A JP S60158157A
Authority
JP
Japan
Prior art keywords
liquid crystal
formula
cyano
expressed
fluoro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1476784A
Other languages
Japanese (ja)
Inventor
Shigeru Sugimori
滋 杉森
Toyoshirou Isoyama
磯山 豊志郎
Yasuyuki Goto
泰行 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JNC Corp
Original Assignee
Chisso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chisso Corp filed Critical Chisso Corp
Priority to JP1476784A priority Critical patent/JPS60158157A/en
Priority to US06/692,166 priority patent/US4659501A/en
Priority to DE8585100949T priority patent/DE3562236D1/en
Priority to EP85100949A priority patent/EP0152014B1/en
Publication of JPS60158157A publication Critical patent/JPS60158157A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

NEW MATERIAL:A compound expressed by formula I (R is 1-10C alkyl or alkoxyl; the ring A is formula II or III; X is halogen, e.g. Br, Cl or F). EXAMPLE:2''-Cyano-4''-fluorophenyl 2-fluoro-4-(trans-4'-propylcyclohexanoyloxy) benzoate. USE:A liquid crystal composition, having strong negative dielectric anisotropy, capable of reducing the threshold voltage, and usable in guest-host type display elements by mixing with another nematic liquid crystal. PREPARATION:The corresponding carboxylic acid chloride expressed by formula IVis reacted with a 2-cyano-4-halogenophenol expressed by formula V in the presence of pyridine to afford the aimed compound expressed by formula I .

Description

【発明の詳細な説明】 本発明は液晶組成物の成分として有用な強い負の誘電異
方性を有する新規な液晶化合物及びそれを含有する液晶
組成物に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to novel liquid crystal compounds having strong negative dielectric anisotropy useful as components of liquid crystal compositions and liquid crystal compositions containing the same.

液晶を応用した表示素子は液晶物質が持つ光学異方性及
び誘電異方性を利用したものであるが、その表示様式に
よってTN型(ねじれネマチック型)、Da型(動的散
乱型)、ゲスト・ホスト型、DAP凰など各種の方式に
分けられ、夫々の使用に適する液晶物質の性質は異なる
Display elements using liquid crystals utilize the optical anisotropy and dielectric anisotropy of liquid crystal materials, and depending on the display format, there are TN type (twisted nematic type), Da type (dynamic scattering type), and guest type. - There are various types such as host type and DAP-type, and the properties of liquid crystal materials suitable for each type of use are different.

液晶物質は水分、空気、熱、光等に安定であることが必
要であることは共通しておシ、又、室温を中心として出
来るだけ広い温度範囲で液晶相を示すものがめられてい
る。現在のところ単一化合物ではこの様な条件を満たす
物質はなく、数種の液晶化合物や非液晶化合物を混合し
て得られる液晶組成物を使用しているのが現状である。
It is common that liquid crystal substances must be stable to moisture, air, heat, light, etc., and it is desired that liquid crystal substances exhibit a liquid crystal phase over as wide a temperature range as possible, centering on room temperature. At present, there is no single compound that satisfies these conditions, and the current situation is to use liquid crystal compositions obtained by mixing several types of liquid crystal compounds and non-liquid crystal compounds.

最近、特にカラー液晶表示方法の一方式であるゲスト・
ホスト型液晶表示素子が注目される様になってきた。こ
れは液晶と色素の混合物を使用するものであるがポジ型
のゲスト・ホスト型表示素子には負の誘電異方性を有す
る液晶材料が使用される。従ってその液晶組成物の構成
成分として、誘電異方性の絶対値が大きく、低粘度でか
つ相溶性にすぐれた液晶性化合物が要求される。
Recently, guest display, which is a color LCD display method, has been
Host-type liquid crystal display devices have started to attract attention. This uses a mixture of liquid crystal and dye, but a liquid crystal material with negative dielectric anisotropy is used for positive type guest-host type display elements. Therefore, a liquid crystal compound having a large absolute value of dielectric anisotropy, low viscosity, and excellent compatibility is required as a component of the liquid crystal composition.

本発明は以上の点に鑑みてなされたもので、負の誘電異
方性を示す液晶組成物を構成する新規な化合物を提供す
ることを目的とする。即ち、本発明は一般式 %式% (上式中、Rは炭素数が1ないし10のアルキル基又は
アルコキシ基ヲ、 へ囚Σは(Σ又は0を、XはBr%CI又はFのハロゲ
ン原子を示す。) で表わされる2−フルオロ−4−ヒドロキシ安息香酸2
′−シアノ−4′−ハロゲノフェニルエステルのエステ
ル誘導体及びそれを含有してなる液晶組成物である。
The present invention has been made in view of the above points, and an object of the present invention is to provide a novel compound constituting a liquid crystal composition exhibiting negative dielectric anisotropy. That is, the present invention is based on the general formula % (in the above formula, R is an alkyl group or an alkoxy group having 1 to 10 carbon atoms, Σ is (Σ or 0, and X is a halogen of Br% CI or F). 2-fluoro-4-hydroxybenzoic acid 2 represented by
The present invention relates to an ester derivative of '-cyano-4'-halogenophenyl ester and a liquid crystal composition containing the same.

本発明の化合物は融点が高いため単独で液晶表示素子に
使用されることはないが、相溶性に優れ、粘度は比較的
低く、その誘電異方性値は一4程度であるので、他のネ
マチック液晶、例エバシクロヘキサンカルボン酸フェニ
ルエステル系、 安息香酸フェニルエステル系、フェニ
ルメタジオキサン系、フェニルピリミジン系、あるいは
その他のネマチック液晶と混合するととKよシ、ゲスト
・ホスト型表示素子に使用できる、負の誘電異方性を有
する液晶組成物を得ることが可能である。これらの組成
物を用いる液晶表示素子のしきい電圧を、本発明の化合
物の添加によシ、著しく低下できる。又、本発明の化合
物を用いることにより、最近多桁表示を行うのに有利と
されている二周波表示法への応用の可能性もある。
The compound of the present invention is not used alone in liquid crystal display elements because of its high melting point, but it has excellent compatibility, relatively low viscosity, and dielectric anisotropy value of about 14, so it cannot be used alone in liquid crystal display elements. When mixed with nematic liquid crystals, such as evacyclohexane carboxylic acid phenyl ester type, benzoic acid phenyl ester type, phenylmethadioxane type, phenylpyrimidine type, or other nematic liquid crystals, it can be used for guest-host type display elements. It is possible to obtain liquid crystal compositions with negative dielectric anisotropy. The threshold voltage of liquid crystal display devices using these compositions can be significantly lowered by adding the compounds of the present invention. Further, by using the compound of the present invention, there is a possibility of application to a two-frequency display method, which has recently been considered advantageous for multi-digit display.

次に本発明の化合物の製造法を示すと、対応するカルボ
ン酸クロリドをピリジン存在下、2−ジアツー4−ハロ
ゲノフェノールと反応させれば目的の化合物が得られる
。これを化学式で示すと次のようになる。
Next, the method for producing the compound of the present invention will be described. The desired compound can be obtained by reacting the corresponding carboxylic acid chloride with 2-dia-2-4-halogenophenol in the presence of pyridine. This can be expressed as a chemical formula as follows.

(上式中孔、%は前記と同様のものを表わす。) ここで用いた2−シアノ−4−ハロゲノフェノールは5
−ハロゲノサリチルアルデヒドのオキ詳細に説明する。
(In the above formula, % represents the same thing as above.) The 2-cyano-4-halogenophenol used here is 5
- Halogenosalicylaldehyde will be explained in detail.

各例中で結晶−ネマチック点をC−N点、ネマチック−
透明点をN−I点と略記する。
In each example, the crystal-nematic point is the C-N point, the nematic-
The clearing point is abbreviated as the NI point.

〔実施例1〕 2−フルオロ−4−(トランス−4′−プロピルシクロ
ヘキサノイルオキシ)安息香酸グーシアノ−4′−フル
オロフェニルエステルの製造(1)2−シアノ−4−フ
ルオロフェノールの製造5−フルオロサリチルアルデヒ
ドのオキシム20、2 t (o、 t aモル)を無
水酢酸100dに溶解し5時間還流した。反応終了後、
無水酢酸を減圧にて留去し、残った油状物に水酸化カリ
ウム20fを水100dに溶解した溶液とエタノール1
001114を加え80℃にて2時間加温した。室温に
まで放冷し、6N塩酸50d1 水200dを加えて、
結晶を析出させた。この結晶を濾過し、3omlのメタ
ノールから再結晶し15.6 fの針状結晶を得た。融
点は121〜122℃であった。
[Example 1] Production of 2-fluoro-4-(trans-4'-propylcyclohexanoyloxy)benzoic acid gucciano-4'-fluorophenyl ester (1) Production of 2-cyano-4-fluorophenol 5- 20.2 t (o, ta mol) of the oxime of fluorosalicylaldehyde was dissolved in 100 d of acetic anhydride and refluxed for 5 hours. After the reaction is complete,
Acetic anhydride was distilled off under reduced pressure, and the remaining oil was mixed with a solution of 20 g of potassium hydroxide dissolved in 100 g of water and 1 g of ethanol.
001114 was added and heated at 80°C for 2 hours. Leave to cool to room temperature, add 50 d of 6N hydrochloric acid and 200 d of water.
Crystals were precipitated. The crystals were filtered and recrystallized from 3 oml of methanol to obtain needle-like crystals of 15.6 f. The melting point was 121-122°C.

(2) エステル化 (1)で得うれた2−シアノ−4−フルオロフェノール
1.5 t (11mmOl)を乾燥したピリジン5 
mlに溶解しておき、これに2−フルオロ−4−()ラ
ンス−4′−プロピルシクロヘキサノイルオキシ)安息
香酸クロリド3.69 (l1mmo/)を乾燥トルエ
ン1omlに溶解した溶液を加え、60℃にて3時間加
熱反応させた。反応終了後反応物を水100mA!中に
加え、トルエン層を分#: L、 6 N塩酸、2N水
酸化ナトリウム溶液、次いで水で洗浄しトルエン層を無
水硫酸ナトリウムで乾燥した。このトルエン溶液からト
ルエンを留去し残った固型物を酢酸エチルlomlから
再結晶して目的の2−フルオロ−4−(トランス−4′
−プロピルシクロヘキサノイルオキシ)安息香酸2“−
シアノ−41−フルオロフェニルエステルz、9r(収
率62チ)を得た。この物のC−N点は114.6℃、
N−N点は119.0’Gでおった。
(2) Pyridine 5 was obtained by drying 1.5 t (11 mmOl) of 2-cyano-4-fluorophenol obtained in esterification (1).
To this was added a solution of 3.69 (l1 mmo/) of 2-fluoro-4-()lance-4'-propylcyclohexanoyloxy)benzoic acid chloride dissolved in 1 oml of dry toluene, and 60 The reaction was carried out by heating at ℃ for 3 hours. After the reaction is complete, pour the reactant into water at 100 mA! The toluene layer was washed with 6N hydrochloric acid, 2N sodium hydroxide solution, and then water for a few minutes, and the toluene layer was dried over anhydrous sodium sulfate. Toluene was distilled off from this toluene solution, and the remaining solid was recrystallized from ethyl acetate loml to obtain the desired 2-fluoro-4-(trans-4'
-Propylcyclohexanoyloxy)benzoic acid 2"-
Cyano-41-fluorophenyl ester z, 9r (yield: 62 t) was obtained. The C-N point of this product is 114.6℃,
The NN point was 119.0'G.

〔実施例2〜4〕 実施例1における2−フルオロ−4−()?ンスー4’
 −7’ロビルシクロヘキサノイルオキシ)安息香酸ク
ロリドおよび2−シアノ−4−フルオロフェノールに替
えて各々対応するカルボン酸クロリド及び2−シアノ−
4−ハロゲノフェノールを使用したほかは実施例1に準
じた操作を行ってそれぞれ目的の化合物を製造した。こ
れらの結果を実施例1の結果と共に第1表に示す。
[Examples 2 to 4] 2-Fluoro-4-() in Example 1? Nsu 4'
-7'rovylcyclohexanoyloxy)benzoic acid chloride and the corresponding carboxylic acid chloride and 2-cyano-4-fluorophenol, respectively.
The desired compounds were produced in the same manner as in Example 1, except that 4-halogenophenol was used. These results are shown in Table 1 together with the results of Example 1.

第1表 応用例1 エフ、4重量% なる組成のエステル系のネマチック液晶組成物へ〇N−
I点は62.8℃、誘電率の異方性aはへ−1,0,2
0℃における粘度は1 B、 5 cpであった。この
混合物に市販のメルク社製色素G−224を1チ添加し
たものをセルに封入してゲスト・ホストセルを作シその
しきい電圧を測定したところ3.80 Vであった。次
に本発明の化合物である実施例1に示した2−フルオロ
−4−(トランス−4′−プロピルシクロヘキサノイル
オキシ)安息香酸2’−シアノ−4′−フルオロフェニ
ルエステル10重量部を前記液晶組成物A90重量部に
加えて液晶組成物を調製した。この液晶組成物のN−N
点は65,8℃、誘電率の異方性Δ6は−3,0,20
℃における粘度は24cpで、これに先と同じく色素G
−224を1チ添加したものでゲスト・ホスト型液晶セ
ルを作ってそのしきい電圧を測定したところ2,5vと
大きく低下した。
Table 1 Application Example 1 F, to an ester-based nematic liquid crystal composition with a composition of 4% by weight 〇N-
Point I is 62.8°C, and the dielectric constant anisotropy a is -1,0,2
The viscosity at 0°C was 1 B, 5 cp. A guest-host cell was prepared by adding 1 g of commercially available dye G-224 manufactured by Merck & Co., Ltd. to this mixture and sealing it in a cell.The threshold voltage of the cell was measured and found to be 3.80V. Next, 10 parts by weight of 2-fluoro-4-(trans-4'-propylcyclohexanoyloxy)benzoic acid 2'-cyano-4'-fluorophenyl ester shown in Example 1, which is a compound of the present invention, was added to the A liquid crystal composition was prepared by adding 90 parts by weight of liquid crystal composition A. N-N of this liquid crystal composition
The point is 65,8℃, the dielectric constant anisotropy Δ6 is -3,0,20
The viscosity at °C is 24 cp, and as before, the dye G
When a guest-host type liquid crystal cell was made using one added with -224 and its threshold voltage was measured, it significantly decreased to 2.5V.

特許出願人 チッソ株式会社 手 続 補 正 書 昭和59年1り月?日 L 事件の我示 昭和59年特杵願第14767号 a 発明の名称 フルオロヒドロキシ安息香[04体 & 補正をする者 事件との関係 特許出願人 大阪府大阪市北区中之島三丁目6番32号(〒530)
(207ンチツソ株式会社 代表者 野 木 貞 雄 転代理人 東京都新宿区病宿2丁目8411号(〒160)&補正
岐令の日付 (自発補正ン d補正の対象 明細書の発明の詳細な説明の欄 I 補正の内容 (1)明細書第6頁第1O行、第7R第8〜9行および
5418行、第8頁第5行、および第9頁下から2行目
、[シクロヘキテノイルオキク」を「シクロヘキシルカ
ルボニルオキシ」とそれぞれ訂正する。
Patent Applicant Chisso Corporation Procedures Amendment Book January 1982? Japan L Case Special Request No. 14767a of 1982 Name of the invention Fluorohydroxybenzoin [04 bodies & Person making the amendment Relationship to the case Patent applicant 3-6-32 Nakanoshima, Kita-ku, Osaka-shi, Osaka Prefecture (〒530)
(Representative of 207 Nchitsuso Co., Ltd. Sada Nogi Substitute agent No. 2-8411 Ishuku, Shinjuku-ku, Tokyo (160) & Date of amendment (Detailed explanation of the invention in the specification subject to the amendment) Column I Contents of the amendment (1) Page 6 of the specification, line 1O, line 7R, lines 8-9 and line 5418, line 5 of page 8, and line 2 from the bottom of page 9, [cyclohextenoyl Correct "Okiku" to "Cyclohexylcarbonyloxy" respectively.

(2)同書第8頁第3行、「実施例2〜4」を「実施例
2〜5」と訂正する。
(2) On page 8, line 3 of the same book, "Examples 2 to 4" is corrected to "Examples 2 to 5."

(r5)同頁第1表を以下のように訂正する。(r5) Table 1 on the same page is corrected as follows.

Claims (2)

【特許請求の範囲】[Claims] (1) 一般式 (上式中、Rは炭素数が1ないし10のアルキル基又は
アルコキシ基を、 C/又はFのハロゲン原子を示す。) で表わされる2−フルオロ−4−ヒドロキシ安息香酸2
′−シアノ−4′−ハロゲノフェニルエステルのエステ
ル誘導体。
(1) 2-fluoro-4-hydroxybenzoic acid 2 represented by the general formula (in the above formula, R represents an alkyl group or an alkoxy group having 1 to 10 carbon atoms, and a halogen atom of C/or F)
Ester derivative of '-cyano-4'-halogenophenyl ester.
(2)一般式 %式% (上式中、几は炭素数が1ないし10のアルキル基又は
アルコキシ基を、 CI又はFのハロゲン原子を示す。) で表わされる2−フルオロ−4−ヒドロキシ安息香酸2
′−シアノ−4′−ハロゲノフェニルエステルのエステ
ル誘導体を含有することを特徴とする液晶組成物。
(2) 2-fluoro-4-hydroxybenzoic acid represented by the general formula % (In the above formula, 几 represents an alkyl group or alkoxy group having 1 to 10 carbon atoms, and a halogen atom of CI or F.) acid 2
A liquid crystal composition comprising an ester derivative of '-cyano-4'-halogenophenyl ester.
JP1476784A 1984-01-30 1984-01-30 Fluorohydroxybenzoic acid derivative Pending JPS60158157A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1476784A JPS60158157A (en) 1984-01-30 1984-01-30 Fluorohydroxybenzoic acid derivative
US06/692,166 US4659501A (en) 1984-01-30 1985-01-17 2-cyano-4-halogenophenyl substituted-benzoates
DE8585100949T DE3562236D1 (en) 1984-01-30 1985-01-30 2-cyano-4-halogenophenyl substituted-benzoates and liquid crystal compositions containing them
EP85100949A EP0152014B1 (en) 1984-01-30 1985-01-30 2-cyano-4-halogenophenyl substituted-benzoates and liquid crystal compositions containing them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1476784A JPS60158157A (en) 1984-01-30 1984-01-30 Fluorohydroxybenzoic acid derivative

Publications (1)

Publication Number Publication Date
JPS60158157A true JPS60158157A (en) 1985-08-19

Family

ID=11870219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1476784A Pending JPS60158157A (en) 1984-01-30 1984-01-30 Fluorohydroxybenzoic acid derivative

Country Status (1)

Country Link
JP (1) JPS60158157A (en)

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