US4526704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiring liquid crystal esters
Assignee: F Hoffmann La Roche AG
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Filing: 1983-07-11
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Granted: 1985-07-02
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Expires: 2003-07-11
Abstract
Abstract Compounds of the formula <IMAGE> I wherein n is 0 or 1; one of X1 and X2 is -COO- or -OOC- and the other is a single covalent bond or -CH2CH2-; X3 and X4 individually are a single covalent bond or -CH2CH2-, with the proviso that at most one of X1, X2, X3 and X4 is -CH2CH2-; rings A1 and A5 individually are a group of the formula <IMAGE> II or trans-1,4-cyclohexylene; rings A2, A3 and A4 individually are a group of formula II or, when ring A2, A3 or A4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A1 through A5 is a group of formula II; Y is hydrogen, or when Y is attached to a ring of formula II which is not linked with another ring via a single covalent bond, Y also can be fluorine, chlorine or methyl; and R1 and R2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R1 or R2 is attached to a ring of formula II such R1 or R2 also can be straight-chain alkoxy of 1 to 7 carbon atoms; their manufacture and use for electro-optical and chromatographical purposes and liquid crystalline mixtures containing these compounds are described.
Inventors
- 👤 Martin Petrzilka
- 👤 Martin Schadt
- 👤 Alois Villiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:11
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/42; C09K19/44
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
A compound of the formula: ##STR22## wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond or --CH 2 CH 2 --; X 3 and X 4 individually are a single covalent bond or --CH 2 CH 2 --; with the proviso that at most one of X 1 , X 2 , X 3 and X 4 is --CH 2 CH 2 --; rings A 1 and A 5 individually are
Claim 2
Dependent Claim
82 words
A compound of the formula: ##STR22## wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond or --CH 2 CH 2 --; X 3 and X 4 individually are a single covalent bond or --CH 2 CH 2 --; with the proviso that at most one of X 1 , X 2 , X 3 and X 4 is --CH 2 CH 2 --; rings A 1 and A 5 individually are
Claim 3
Dependent Claim
110 words
4-phenylene or trans-1,4-cyclohexylene; rings A 2 , A 3 and A 4 individually are 1,4-phenylene or, when ring A 2 , A 3 or A 4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A 1 through A 5 is 1,4-phenylene; and R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R 1 or R 2 is attached to 1,4-phenylene such R 1 or R 2 also can be straight-chain alkoxy of 1 to 7 carbon atoms.
Claim 4
Dependent Claim
110 words
4-phenylene or trans-1,4-cyclohexylene; rings A 2 , A 3 and A 4 individually are 1,4-phenylene or, when ring A 2 , A 3 or A 4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A 1 through A 5 is 1,4-phenylene; and R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R 1 or R 2 is attached to 1,4-phenylene such R 1 or R 2 also can be straight-chain alkoxy of 1 to 7 carbon atoms.
Claim 5
Dependent Claim
21 words
The compound of claim 1 wherein X 2 is --COO-- or --OOC--; and X 1 is --CH 2 CH 2 --.
Claim 6
Dependent Claim
37 words
The compound of claim 1 wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond; and X 3 and X 4 individually are a single covalent bond.
Claim 7
Dependent Claim
18 words
The compound of claim 1 wherein at least one of rings A 1 through A 5 is trans-1,4-cyclohexylene.
Claim 8
Dependent Claim
129 words
The compound of claim 1 wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond; X 3 and X 4 individually are a single covalent bond; rings A 1 and A 5 individually are 1,4-phenylene or trans-1,4-cyclohexylene; rings A 2 , A 3 and A 4 individually are 1,4-phenylene or, when ring A 2 , A 3 or A 4 is not linked with at least one of the other two of these rings by single covalent bond, then such ring also can be trans-1,4-cyclohexylene; with the proviso that at least one of rings A 1 through A 5 is 1,4-phenylene and with the further proviso that at least one of rings A 1 through A 5 is trans-1,4-cyclohexylene.
Claim 9
Dependent Claim
12 words
The compound of claim 1 wherein X 2 is --COO-- or --OOC--.
Claim 10
Dependent Claim
21 words
The compound of claim 1 wherein R 1 and R 2 individually are straight-chain alkyl of 1 to 7 carbon atoms.
Claim 11
Dependent Claim
22 words
The compound of claim 1 wherein the sum of the carbon atoms in R 1 and R 2 is 5 to 10.
Claim 12
Dependent Claim
97 words
A liquid crystalline mixture comprising at least two components at least one of which is a compound of the formula: ##STR23## wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond or --CH 2 CH 2 --; X 3 and X 4 individually are a single covalent bond or --CH 2 CH 2 --, with the proviso that at most one of X 1 , X 2 , X 3 and X 4 is --CH 2 CH 2 --; rings A 1 and A 5 individually are
Claim 13
Dependent Claim
97 words
A liquid crystalline mixture comprising at least two components at least one of which is a compound of the formula: ##STR23## wherein one of X 1 and X 2 is --COO-- or --OOC-- and the other is a single covalent bond or --CH 2 CH 2 --; X 3 and X 4 individually are a single covalent bond or --CH 2 CH 2 --, with the proviso that at most one of X 1 , X 2 , X 3 and X 4 is --CH 2 CH 2 --; rings A 1 and A 5 individually are
Claim 14
Dependent Claim
110 words
4-phenylene or trans-1,4-cyclohexylene; rings A 2 , A 3 and A 4 individually are 1,4-phenylene or, when ring A 2 , A 3 or A 4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A 1 through A 5 is 1,4-phenylene; and R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R 1 or R 2 is attached to 1,4-phenylene such R 1 or R 2 also can be straight-chain alkoxy of 1 to 7 carbon atoms.
Claim 15
Dependent Claim
110 words
4-phenylene or trans-1,4-cyclohexylene; rings A 2 , A 3 and A 4 individually are 1,4-phenylene or, when ring A 2 , A 3 or A 4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A 1 through A 5 is 1,4-phenylene; and R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R 1 or R 2 is attached to 1,4-phenylene such R 1 or R 2 also can be straight-chain alkoxy of 1 to 7 carbon atoms.
Claim 16
Dependent Claim
158 words
The liquid crystalline mixture of claim 9 wherein the other component is selected from the group of compounds consisting of: ##STR24## wherein R 3 is straight-chain alkyl or alkoxy of 2 to 7 carbon atoms; ##STR25## wherein R 4 is straight-chain alkyl of 2 to 7 carbon atoms and R 5 is cyano or straight-chain alkyl of 1 to 7 carbon atoms; ##STR26## wherein R 4 is as above; ##STR27## wherein R 4 is as above; ##STR28## wherein R 4 is as above; ##STR29## wherein R 6 is cyano or straight-chain alkoxy of 1 to 6 carbon atoms and R 4 is as above; ##STR30## wherein R 4 and R 6 are as above; ##STR31## wherein R 7 is straight-chain alkyl of 3 to 7 carbon atoms and R 8 is cyano or straight-chain alkyl or alkoxy of 1 to 7 carbon atoms; ##STR32## wherein R 4 is as above; and ##STR33## wherein R 4 is as above.
Claim 17
Dependent Claim
9 words
The compound of claim 1, 4'-(trans-4-pentylcyclohexyl)-4-biphenylcarboxylic acid trans-4-(p-propylphenyl)cyclohexyl ester.
Claim 18
Dependent Claim
9 words
The compound of claim 1, 4'-(trans-4-pentylcyclohexyl)-4-biphenylcarboxylic acid trans-4-(p-butylphenyl)cyclohexyl ester.
Claim 19
Dependent Claim
9 words
The compound of claim 1, 4'-(trans-4-pentylcyclohexyl)-4-biphenylcarboxylic acid p-(trans-4-propylcyclohexyl)phenyl ester.
Claim 20
Dependent Claim
9 words
The compound of claim 1, 4'-(trans-4-pentylcyclohexyl)-4-biphenylcarboxylic acid p-(trans-4-butylcyclohexyl)phenyl ester.
Claim 21
Dependent Claim
65 words
The compound of claim 1 wherein the compound is selected from the group of compounds consisting of: ##STR34## wherein E is --COO-- or --OOC--; and R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R 1 or R 2 is attached to 1,4-phenylene, such R 1 or R 2 may also be alkoxy of 1 to 7 carbon atoms.
Claim 22
Dependent Claim
23 words
The compound of claim 15 having the formula: ##STR35## wherein R 1 and R 2 individually are straight-chain alkyl of 1-7 carbon atoms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |