US5264149A
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Liquid crystal compounds having a terminal 1-alkynyl residue
Assignee: Merck Patent GmbH
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Filing: 1992-05-07
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Granted: 1993-11-23
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Expires: 2012-05-07
Abstract
Abstract Compounds of the formula <IMAGE> I wherein n stands for the number 0 or 1; rings A, B and C each independently represent trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R1 denotes 3E-alkenyl with 4 to 12 carbon atoms, 4-alkenyl with 5 to 12 carbon atoms or, when ring A represents trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl, also 1E-alkenyl with 2 to 12 carbon atoms; and R2 is hydrogen or C1-C10-alkyl, their manufacture as well as liquid crystalline mixtures which contain such compounds and their use for electro-optical purposes.
Inventors
- 👤 Richard Buchecker
- 👤 Martin Schadt
- 👤 Frank Seils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07; C07D; C07D319/00; C07D319/04; C07D319/06; C09K19/10; C09K19/12; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A compound of formula ##STR8## wherein n is the number 0 or 1; ring A is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; rings B and C each independently are trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R 1 is 1E-alkenyl with 2 to 12 carbon atoms; and R 2 is hydrogen or C 1 -C 10 -alkyl, with the proviso that no more than one trans-1,3-dioxane-2,5-diyl ring is present.
Claim 2
Dependent Claim
66 words
A compound of formula ##STR8## wherein n is the number 0 or 1; ring A is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; rings B and C each independently are trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R 1 is 1E-alkenyl with 2 to 12 carbon atoms; and R 2 is hydrogen or C 1 -C 10 -alkyl, with the proviso that no more than one trans-1,3-dioxane-2,5-diyl ring is present.
Claim 3
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR9## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 4
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR10## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 5
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR11## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 6
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR12## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 7
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR13## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 8
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR14## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 9
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR15## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 10
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR16## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen of C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 11
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR17## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 12
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR18## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 13
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR19## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 14
Dependent Claim
42 words
The compound of claim 1, having the formula ##STR20## wherein X 1 and X 2 each independently are hydrogen or fluorine; R 2 is hydrogen or C 1 -C 10 -alkyl; and R 1 is 1E-alkenyl with 2 to 12 carbon atoms.
Claim 15
Dependent Claim
10 words
The compound of claim 1, wherein R 1 is 1E-propenyl.
Claim 16
Dependent Claim
84 words
A liquid crystalline mixture having at least two components, wherein at least one of such components is a compound of the formula ##STR21## wherein n is the number 0 or 1; ring A is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; rings B and C each independently are trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R 1 is 1E-alkenyl with 2 to 12 carbon atoms; and R 2 is hydrogen or C 1 -C 10 -alkyl, with the proviso that no more than one trans-1,3-dioxane-2,5-diyl ring is present.
Claim 17
Dependent Claim
84 words
A liquid crystalline mixture having at least two components, wherein at least one of such components is a compound of the formula ##STR21## wherein n is the number 0 or 1; ring A is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; rings B and C each independently are trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R 1 is 1E-alkenyl with 2 to 12 carbon atoms; and R 2 is hydrogen or C 1 -C 10 -alkyl, with the proviso that no more than one trans-1,3-dioxane-2,5-diyl ring is present.
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