US4873018A
Expired / Lapsed
US
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Optically active compound, process for producing same and liquid crystal composition containing same
Assignee: Canon Inc
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Filing: 1987-10-27
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Granted: 1989-10-10
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Expires: 2007-10-27
Abstract
Abstract An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substitutent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
Inventors
- 👤 Hiroyuki Nohira
- 👤 Masanao Kamei
- 👤 Shinichi Nakamura
- 👤 Kazuo Yoshinaga
- 👤 Mariko Kai
- 👤 Kazuharu Katagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:23
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
54 words
An optically active compound represented by the formula (Ib): wherein R is an alkyl group having 1-16 carbon atoms, C* is an asymmetric carbon atom, m is 1 or 2, n is 0 or 1, and A is a releaseable substituent selected from the group consisting of hydroxy, halogen, phenoxy, toluenesulfonyl, acetyloxy, and trifluoroacetyloxy.
Claim 2
Dependent Claim
54 words
An optically active compound represented by the formula (Ib): wherein R is an alkyl group having 1-16 carbon atoms, C* is an asymmetric carbon atom, m is 1 or 2, n is 0 or 1, and A is a releaseable substituent selected from the group consisting of hydroxy, halogen, phenoxy, toluenesulfonyl, acetyloxy, and trifluoroacetyloxy.
Claim 3
Dependent Claim
11 words
A compound according to claim 1, wherein said A is acetyloxy.
Claim 4
Dependent Claim
11 words
A compound according to claim 1, wherein said A is hydroxy.
Claim 5
Dependent Claim
11 words
A compound according to claim 1, wherein said R is pentyl.
Claim 6
Dependent Claim
11 words
A compound according to claim 1, wherein said R is hexyl.
Claim 7
Dependent Claim
11 words
A compound according to claim 1, wherein said R is heptyl.
Claim 8
Dependent Claim
12 words
A compound according to claim 1 , wherein said R is octyl.
Claim 9
Dependent Claim
11 words
A compound according to claim 1, wherein said R is lauryl.
Claim 10
Dependent Claim
68 words
A liquid crystal composition comprising a liquid crystal and at least one species of optically active compound represented by the formula (Ib): ##STR17## wherein R is an alkyl group having 1-16 carbon atoms, C* is an asymmetric carbon atom, m is 1 or 2, n is 0 or 1, and A is a releaseable substituent selected from the group consisting of hydroxy, halogen, phenoxy, toluenesulfonyl, acetyloxy, and trifluoroacetyloxy.
Claim 11
Dependent Claim
68 words
A liquid crystal composition comprising a liquid crystal and at least one species of optically active compound represented by the formula (Ib): ##STR17## wherein R is an alkyl group having 1-16 carbon atoms, C* is an asymmetric carbon atom, m is 1 or 2, n is 0 or 1, and A is a releaseable substituent selected from the group consisting of hydroxy, halogen, phenoxy, toluenesulfonyl, acetyloxy, and trifluoroacetyloxy.
Claim 12
Dependent Claim
20 words
A liquid crystal composition according to claim 9, which has a temperature range wherein it assumes a chiral smectic phase.
Claim 13
Dependent Claim
18 words
A liquid crystal composition according to claim 10, wherein said chiral smectic phase is chiral smectic C phase.
Claim 14
Dependent Claim
20 words
A liquid crystal composition according to claim 9, wherein said liquid crystal is a liquid crystal showing a smectic phase.
Claim 15
Dependent Claim
16 words
A liquid crystal composition according to claim 12, wherein said smectic phase is chiral smectic phase.
Claim 16
Dependent Claim
17 words
A liquid crystal composition according to claim 9, wherein said liquid crystal is a nematic liquid crystal.
Claim 17
Dependent Claim
18 words
A liquid crystal composition according to claim 9, wherein said liquid crystal is a chiral nematic liquid crystal.
Claim 18
Dependent Claim
21 words
A liquid crystal composition according to claim 12 wherein said liquid crystal showing a smectic phase is a ferroelectric liquid crystal.
Claim 19
Dependent Claim
23 words
A liquid crystal composition according to claim 16, which contains said optically active compound in a proportion of 0.1 to 80 wt. %.
Claim 20
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a biphenyl-4-carboxylate unit.
Claim 21
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has an azoxybenzene unit.
Claim 22
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a 2-phenylpyrimidine unit.
Claim 23
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a phenylbenzoate unit.
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