Patent GB2102000A successfully refreshed from Google Patents.
GB2102000A
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GB
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2-(Cyclohexyl)ethyl-cyclo- hexylnitriles and their use in liquid crystal compositions
Assignee: F Hoffmann La Roche AG
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Filing: 1982-07-16
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Granted: —
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Expires: 2002-07-16
Abstract
Abstract Compounds of the formula <IMAGE> wherein R<1> signifies a straight-chain alkyl group containing 1 to 12 carbon atoms, are especially valuable as components of nematic and cholestric liquid crystal mixtures with positive anisotropy of the dielectric constants and are used for electro- optical purposes.
Inventors
- 👤 Martin Petrzilka
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-11-02 13:09
CPC Classifications
C; C07; C07C; C07C255/00; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C31/00; C07C31/13; C07C31/133; C07C31/135; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3028; C07B; C07B2200/00; C07B2200/09; C07C2601/00; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/26; C07C2602/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
19 words
Compounds of the general formula wherein R1 signifies a straight-chain alkyl group containing 1 to 1 2 carbon atoms.
Claim 2
Dependent Claim
19 words
Compounds of the general formula wherein R1 signifies a straight-chain alkyl group containing 1 to 1 2 carbon atoms.
Claim 3
Dependent Claim
18 words
Compounds according to claim 1, wherein R' signifies a straight-chain alkyl group containing 2 to 9 carbon atoms.
Claim 4
Dependent Claim
21 words
Compounds according to claim 1 or claim 2, wherein R' signifies a straight-chain alkyl group containing 3 to 7 carbon atoms.
Claim 5
Dependent Claim
1 words
Trans-4-[2-(trans-4-pentylcyclohexyl)ethyl]cyclohexanecarbonitrile.
Claim 6
Dependent Claim
1 words
Trans-4-[2-(trans-4-pentylcyclohexyl)ethyl]cyclohexanecarbonitrile.
Claim 7
Dependent Claim
2 words
Trans-4-[2-(trans-4-propylcyclohexyl)ethyl]cyclohexanecarbon itrile.
Claim 8
Dependent Claim
2 words
Trans-4-[2-(trans-4-propylcyclohexyl)ethyl]cyclohexanecarbon itrile.
Claim 9
Dependent Claim
24 words
A liquid crystalline mixture containing at least two components, wherein at least one component is a compound of formula I defined in claim 1.
Claim 10
Dependent Claim
101 words
A process for the manufacture of compounds of the general formula wherein R' signifies a straight-chain alkyl group containing 1 to 1 2 carbon atoms, which process comprises (a) reacting a compound of the general formula wherein Y represents chlorine, bromine or iodine and R' has the significance given earlier in this claim, and a compound of the general formula wherein Z signifies bromine, iodine, an alkylsulphonyloxy group or an arylsulphonyloxy group, in the presence of dilithium tetrachlorocuprate or dilithium tetrabromocuprate, or (b) catalytically hydrogenating a compound of the general formula wherein R' has the significance given earlier in this claim.
Claim 11
Dependent Claim
15 words
The use of the compounds of formula I defined in claim 1 for electro-optical purposes.
References Cited (Backward Citations)
No citation records indexed.
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