EP0257457A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optically active 2-methyl 1,3-propanediol derivatives, liquid crystal compositions comprising them and optical switching element
Assignee: JNC Corp
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Filing: 1987-08-12
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Granted: —
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Expires: 2007-08-12
Abstract
Abstract A compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asymmetrical carbon atom, a liquid crystal composition comprising at least one compound of formula (I), and an optical switching element using as a liquid crystal a liquid crystal composition comprising at least one compound of formula (I) are disclosed. The compound of formula (I) has a property to increase the degree of spontaneous polarization and is useful as a component of a liquid crystal composition.
Inventors
- 👤 Shinichi Saito
- 👤 Kouji Ohno
- 👤 Takashi Inukai
- 👤 Hiromichi Inoue
- 👤 Kazutoshi Miyazawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:51
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D239/28; C07D239/32; C07D239/34; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/34; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3452; C09K19/3455; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
A compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asymmetrical carbon atom.
Claim 2
Dependent Claim
152 words
A compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asymmetrical carbon atom.
Claim 3
Dependent Claim
22 words
The compound as claimed in Claim 1, wherein R¹ is an alkyl or alkoxy group having from 4 to 16 carbon atoms.
Claim 4
Dependent Claim
22 words
The compound as claimed in Claim 1, wherein R² is an alkyl, alkanoyl or alkoxyalkanoyl group having up to 10 carbon atoms.
Claim 5
Dependent Claim
10 words
The compound as claimed in Claim 1, wherein -A-B- is
Claim 6
Dependent Claim
159 words
A liquid crystal composition comprising at least one compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asymmetrical carbon atom.
Claim 7
Dependent Claim
159 words
A liquid crystal composition comprising at least one compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asymmetrical carbon atom.
Claim 8
Dependent Claim
17 words
The liquid crystal composition as claimed in Claim 5, wherein the composition exhibits a chiral smectic phase.
Claim 9
Dependent Claim
170 words
An optical switching element utilizing as a liquid crystal a ferroelectric liquid crystal composition comprising at least one compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asy rical carbon atom.
Claim 10
Dependent Claim
170 words
An optical switching element utilizing as a liquid crystal a ferroelectric liquid crystal composition comprising at least one compound represented by formula (I) wherein R¹ represents an alkyl group having 1 to 20 carbon atoms or an alkoxy group having from 1 to 20 carbon atoms, R² represents an alkyl group having from 1 to 15 carbon atoms, an alkanoyl group having from 2 to 15 carbon atoms, an alkoxycarbonyl group having from 2 to 15 carbon atoms, an alkoxyalkyl group having from 2 to 15 carbon atoms, an alkoxyalkanoyl group having from 3 to 15 carbon atoms, a halogenated alkyl group having from 1 to 15 carbon atoms or a halogenated alkanoyl group having from 2 to 15 carbon atoms, and the alkyl moiety in R¹ and R² is straight or branched; A and B each represents wherein X represents a halogen atom, a cyano group or a trifluoromethyl group; and the asterisk mark * indicates that the carbon atom provided with * is an asy rical carbon atom.
References Cited (Backward Citations)
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