Patent EP0255219A2 successfully refreshed from Google Patents.
EP0255219A2
Expired / Lapsed
EP
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Omega-substituted, optically active 2-alkanol ester derivatives
Assignee: JNC Corp
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Filing: 1987-06-09
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Granted: —
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Expires: 2007-06-09
Abstract
Abstract Compounds suitable for use in liquid crystal compositions (for example for use as light switching elements) have the formula: in R¹ is a straight or branched chain alkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl, alkoxycarbonyloxy or alkoxyalkyl group, each containing from 1 to 20 carbon atoms; R² is hyrogen atom or a straight or branched alkyl, alkoxy or ω-halogen-substituted alkyl group, cyano, thioalkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl or alkoxycarbonyloxy group, each containing from 1 to 15 carbon atoms; each independently represent a group (in which X is hydrogen, fluorine, chlorine atom or a cyano, methyl or trifluoromethyl group); m is 0 or 1; n is a natural number of 1 to 10; and the symbol * indicates that the carbon atom to which the symbol X is attached is an symmetric carbon atom.
Inventors
- 👤 Shinichi Saito
- 👤 Takashi Inukai
- 👤 Hiromichi Inoue
- 👤 Kazutoshi Miyazawa
- 👤 Kouji Ohno
- 👤 Makoto Ushioda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 15:05
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; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/18; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/30; C09K19/3001; C09K19/3003; C09K19/34; C09K19/3441; C09K19/42; C09K19/44; C09K19/46
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
Compounds of the formula: in which R¹ is a straight or branched alkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl, alkoxycarbonyloxy or alkoxyalkyl group, each containing from 1 to 20 carbon atoms; R² is a hydrogen atom or a straight or branched alkyl, alkoxy ω-halo-substituted alkyl, cyano thioalkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl or alkoxycarbonyloxy group, each containing from 1 to 15 carbon atoms; and are the same or are different and each is a group: (in which X is a hydrogen, fluorine chlorine atom or a cyano, methyl or trifluoromethyl group); m is 0 or 1; n is a natural number of 1 to 10; and the symbol * indicates that the carbon atom to which the symbol is attached is an asymmetric carbon atom.
Claim 2
Dependent Claim
122 words
Compounds of the formula: in which R¹ is a straight or branched alkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl, alkoxycarbonyloxy or alkoxyalkyl group, each containing from 1 to 20 carbon atoms; R² is a hydrogen atom or a straight or branched alkyl, alkoxy ω-halo-substituted alkyl, cyano thioalkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl or alkoxycarbonyloxy group, each containing from 1 to 15 carbon atoms; and are the same or are different and each is a group: (in which X is a hydrogen, fluorine chlorine atom or a cyano, methyl or trifluoromethyl group); m is 0 or 1; n is a natural number of 1 to 10; and the symbol * indicates that the carbon atom to which the symbol is attached is an asymmetric carbon atom.
Claim 3
Dependent Claim
12 words
Compounds as claimed in claim 1 in the grouPing is a grouping
Claim 4
Dependent Claim
25 words
Compounds as claimed in claim 2 wherein either one of the groups or is substituted with a fluorine atom or a cyano or methyl group.
Claim 5
Dependent Claim
29 words
Compound as claimed in any one of the preceding claims in which R¹ contains from 4 to 15 carbon atoms and R² contains from 1 to 8 carbon atoms.
Claim 6
Dependent Claim
25 words
Compound as claimed in claim 4 in which R¹ contains from 6 to 12 carbon atoms and R² contains from 1 to 6 carbon atoms.
Claim 7
Dependent Claim
25 words
Compounds as claimed in any one of the preceding claims in which m is 1 n is a natural number of from 1 to 6.
Claim 8
Dependent Claim
26 words
A liquid crystal composition comprising at least two components at least one of which is a compound as claimed in any one of the preceding claims.
Claim 9
Dependent Claim
15 words
A liquid crystal composition as claimed in claim 7 which exhibits a chiral smectic phase.
Claim 10
Dependent Claim
15 words
A liquid crystal composition as claimed in claim 7 which exhibits a chiral nematic phase.
Claim 11
Dependent Claim
13 words
A light-switching element comprising a liquid crystal composition as claimed in claim 7.
References Cited (Backward Citations)
No citation records indexed.
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