US4882085A
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Lactic acid derivative and liquid crystal composition containing same
Assignee: Canon Inc
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Filing: 1988-12-28
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Granted: 1989-11-21
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Expires: 2008-12-28
Abstract
Abstract An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; l is 0 or 1; m is 1 or 2; A represents a group selected from the following groups (a) and (b): (a) hydroxyl group, halogen, benzyloxy group, phenoxy group, toluenesulfonic acid group, acetyloxy group trifluoroacetyloxy group; ##STR2## (wherein R' is an alkyl group or alkoxy group having 4 to 18 carbon atoms, n is 0 or 1, ##STR3## with proviso that when A is selected from the group in the above group (a), l is 1 and m is 1 or 2; and when A is selected from the groups in the above group (b), m=n=1 when l is 0, or m and n are 0, 1 or 2 and m+n is 1 or 2 when l is 1, and ##STR4##
Inventors
- 👤 Kazuo Yoshinaga
- 👤 Kazuharu Katagiri
- 👤 Akira Tsuboyama
- 👤 Hiroyuki Kitayama
- 👤 Kenji Shinjo
- 👤 Chieko Hioki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:12
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/84; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
62 words
An optically active lactic acid derivative represented by the following formula (V): ##STR111## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 2
Dependent Claim
62 words
An optically active lactic acid derivative represented by the following formula (V): ##STR111## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 3
Dependent Claim
17 words
A lactic acid derivative according to claim 1, wherein said R has 4 to 16 carbon atoms.
Claim 4
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is C 2 H 5 --, and R' is n--C 8 H 17 O--.
Claim 5
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 3 H 7 --, and R' is n--C 8 H 17 O--.
Claim 6
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is C 2 H 5 --, and R' is n--C 10 H 21 O--.
Claim 7
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 3 H 7 --, and R' is n--C 10 H 21 O--.
Claim 8
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 12 H 25 , and R' is n--C 5 H 11 O--.
Claim 9
Dependent Claim
37 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, m is 1, n is 1, R is n--C 12 H 25 --, and R' is n--C 12 H 25 O--.
Claim 10
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 8 H 17 --, and R' is n--C 8 H 17 O--.
Claim 11
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 5 H 11 --, and R' is n--C 16 H 33 O--.
Claim 12
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 8 H 17 --, and R' is n--C 7 H 15 O--.
Claim 13
Dependent Claim
34 words
A lactic acid derivative according of claim 1, wherein, in the formula (V), m is 1, n is 0, R is n--C 6 H 11 , and R' is n--C 12 H 25 O--.
Claim 14
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 2, n is 0, R is n--C 5 H 11 --, and R' is n--C 10 H 21 O--.
Claim 15
Dependent Claim
74 words
A chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR112## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 16
Dependent Claim
74 words
A chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR112## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 17
Dependent Claim
17 words
A liquid crystal composition according to claim 14, wherein said R has 4 to 16 carbon atoms.
Claim 18
Dependent Claim
124 words
A liquid crystal composition, which comprises containing at least one of optically active lactic acid derivatives represented by the formula (IV): ##STR113## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents an alkyl group or alkoxy group having 4 to 18 carbon atoms; and ##STR114## and at least one of optically active lactic acid derivatives represented by the following formula (V): ##STR115## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 19
Dependent Claim
124 words
A liquid crystal composition, which comprises containing at least one of optically active lactic acid derivatives represented by the formula (IV): ##STR113## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents an alkyl group or alkoxy group having 4 to 18 carbon atoms; and ##STR114## and at least one of optically active lactic acid derivatives represented by the following formula (V): ##STR115## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 20
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said R has 4 to 16 carbon atoms.
Claim 21
Dependent Claim
67 words
A liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR116## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 22
Dependent Claim
67 words
A liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR116## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 23
Dependent Claim
89 words
A liquid crystal device comprising a pair of oppositely spaced electrodes and a liquid crystal composition disposed between the oppositely spaced electrodes; said liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR117## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 24
Dependent Claim
89 words
A liquid crystal device comprising a pair of oppositely spaced electrodes and a liquid crystal composition disposed between the oppositely spaced electrodes; said liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR117## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 25
Dependent Claim
101 words
A ferroelectric liquid crystal device, which comprises a pair or oppositely spaced electrodes and a chiral smectic liquid crystal composition disposed between the oppositely spaced electrodes; said chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR118## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; and n is 0 or 1 and m+n=1 or 2.
Claim 26
Dependent Claim
101 words
A ferroelectric liquid crystal device, which comprises a pair or oppositely spaced electrodes and a chiral smectic liquid crystal composition disposed between the oppositely spaced electrodes; said chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR118## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; and n is 0 or 1 and m+n=1 or 2.
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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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |