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EP0267758A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Alpha-substituted-propionic acid esters

Assignee: JNC Corp
•
Filing: 1987-11-06
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Granted: —
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Expires: 2007-11-06
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Abstract

Abstract An optically active compound exhibiting high speed response properties when used as a component of liquid crystal materials used in a liquid crystal display mode utilizing ferroelectricity, and a liquid crystal composition containing the compound are provided, which compund is expressed by the formula <CHEM> wherein R<1> represents alkyl, alkoxy or alkoxycarbonyl each of 2 to 18 C, R<2> represents alkyl of 3 to 18C or alkoxy of 1 to 18C and A represents a member selected from a group of two directly bonded six-membered rings having a halogen atom, cyano group, methyl group or trifluoromethyl group attached thereonto and * represents an unsymmetric carbon atom.

Inventors

  • 👤 Kouji Ohno
  • 👤 Shinichi Saito
  • 👤 Takashi Inukai
  • 👤 Hiromichi Inoue
  • 👤 Kazutoshi Miyazawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 15:17
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/34; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3458; C09K19/3463

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 76 words
An optically active compound expressed by the formula wherein R¹ represents an alkyl group, an alkoxy group or an alkoxycarbonyl group each of 2 to 18 carbon atoms, R² represents an alkyl group of 3 to 18 carbon atoms or an alkoxy group of 1 to 18 carbon atoms, A represents wherein X represents hydrogen atom, fluorine atom, chlorine atom, cyano group, methyl group or trifluoro­methyl group, and the symbol * represents an unsymmetric carbon atom.
Claim 2
Dependent Claim 76 words
An optically active compound expressed by the formula wherein R¹ represents an alkyl group, an alkoxy group or an alkoxycarbonyl group each of 2 to 18 carbon atoms, R² represents an alkyl group of 3 to 18 carbon atoms or an alkoxy group of 1 to 18 carbon atoms, A represents wherein X represents hydrogen atom, fluorine atom, chlorine atom, cyano group, methyl group or trifluoro­methyl group, and the symbol * represents an unsymmetric carbon atom.
Claim 3
Dependent Claim 24 words
An optically active compound according to claim 1 wherein R² of the formula (I) is an alkyl group of 3 to 8 carbon atoms.
Claim 4
Dependent Claim 24 words
An optically active compound according to claim 1 wherein R² of the formula (I) is an alkoxy group of 3 to 8 carbon atoms.
Claim 5
Dependent Claim 18 words
An optically active compound of the formula (I) according to claim 1 wherein A of the formula represents
Claim 6
Dependent Claim 29 words
A liquid crystal composition comprising at least two components at least one of which is an optically active compound of the formula (I) as set forth in claim 1.
Claim 7
Dependent Claim 12 words
A liquid crystal composition according to claim 5, exhibiting chiral smectic phase.
Claim 8
Dependent Claim 12 words
A liquid crystal composition according to claim 5, exhibiting chiral nematic phase.
Claim 9
Dependent Claim 41 words
A liquid crystal display element using a liquid crystal composition which comprises at least two components at least one of which is an optically active compound of the formula (I) as set forth in claim 1 and exhibits chiral smectic phase.

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