US5068053A
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Ethyne derivatives as a component of liquid crystal phases
Assignee: Merck Patent GmbH
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Filing: 1988-03-10
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Granted: 1991-11-26
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Expires: 2008-03-10
Abstract
Abstract Ethyne derivatives of the formula I R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.3 --C.tbd.C--A.sup.4 -(Z.sup.2 -A 2 ) n --R 2 I wherein R 1 , A 1 , Z 1 m, A 3 , A 4 , Z 2 , A 2 , n and R 2 have the meaning given in claim 1 are suitable as components of liquid crystal phases.
Inventors
- 👤 Volker Reiffenrath
- 👤 Eike Poetsch
- 👤 Joachim Krause
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:13
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07C; C07C13/00; C07C13/28; C07C23/00; C07C23/18; C07C25/00; C07C25/24; C07C255/00; C07C43/00; C07C43/02; C07C43/20; C07C43/215; C07C43/225; C07D213/06; C07D213/16; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/16; C07D237/00; C07D237/02; C07D237/06; C07D237/08; C07D237/10; C07D237/12; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D239/28; C07D239/32; C07D239/34; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/16; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3059; C09K19/3098; C09K19/32; C09K19/321; C09K19/34; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3455; C09K19/3458; C09K19/3461
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
An ethyne derivative of Formula I ##STR4## wherein R 1 and R 2 in each case independently of one another are straight-chain alkyl, alkoxy, or oxaalkyl having 1 to 15 C atoms; m is 1 or 1; and A 3 and A 4 are each independently 1,4-phenylene, pyridine-2,5-diyl, or pyrimidine-2,5-diyl, with the proviso that only one of the groups A 3 and A 4 is pyridine2,5-diyl or pyrimidine-2,5-diyl.
Claim 2
Dependent Claim
68 words
An ethyne derivative of Formula I ##STR4## wherein R 1 and R 2 in each case independently of one another are straight-chain alkyl, alkoxy, or oxaalkyl having 1 to 15 C atoms; m is 1 or 1; and A 3 and A 4 are each independently 1,4-phenylene, pyridine-2,5-diyl, or pyrimidine-2,5-diyl, with the proviso that only one of the groups A 3 and A 4 is pyridine2,5-diyl or pyrimidine-2,5-diyl.
Claim 3
Dependent Claim
7 words
##STR5## , a compound of claim 5.
Claim 4
Dependent Claim
26 words
A liquid crystal phase containing at least two liquid crystal components, wherein at least one component is a compound of Formula i according to claim 7
Claim 5
Dependent Claim
23 words
A liquid crystal display element containing at least one liquid crystal phase, wherein said liquid crystal phase is one according to claim 3.
Claim 6
Dependent Claim
10 words
An ethylene derivative of claim 1, of the formula ##STR6##
Claim 7
Dependent Claim
10 words
An ethylene derivative of claim 1, of the formula ##STR7##
References Cited (Backward Citations)
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