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US5152919A
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Optically active compounds, liquid crystal compositions comprising said compounds, and liquid crystal optical modulators using said compositions
Assignee: Hitachi Ltd
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Filing: 1990-03-22
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Granted: 1992-10-06
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Expires: 2010-03-22
Abstract
Abstract The present invention discloses dichiral compounds represented by the general formula ##STR1## (R 1 , R 2 , R 3 , R 4 , Q 1 , Q 2 , Q 3 , M and n have the same definitions as in the description portion of the specification), intermediates for preparation of said compounds, liquid crystal compositions comprising said compounds, and liquid crystal optical modulators using said compositions.
Inventors
- 👤 Teruo Kitamura
- 👤 Katsumi Kondo
- 👤 Yuka Sudo
- 👤 Koichi Matsumura
- 👤 Mitsuru Kawada
- 👤 Yoshihiro Sugihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/46; C07C323/00; C07C323/10; C07C323/18; C07C323/20; C07C327/00; C07C327/20; C07C327/28; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/20; C09K19/2007; C09K19/2021; C09K19/28; C09K19/34; C09K19/3402; C09K19/3441; C09K19/345; C09K19/3455; C09K19/3458; C09K19/3463; C09K19/44; C09K2019/3422
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
An optically active compound represented by the formula: ##STR132## wherein R 1 is a straight chain alkyl group of 6 to 12 carbon atoms or a straight chain alkenyl group of 6 to 12 carbon atoms; R 2 and R 3 are independently a lower alkyl group of 1 to 3 carbon atoms; R 4 is a straight chain alkyl group of 1 to 8 carbon atoms; Q 1 is a single bond, an ether bond or a --C(═O)--O-- ester bond; Q 2 and Q 3 are independently a carboxylic acid ester bond or an ether bond; M is ##STR133## in which one of X and Y is a single bond, the other is a carboxylic acid ester bond, and all rings ##STR134## are p-phenylene or ring ##STR135## and ring ##STR136## are p-phenylene and ring ##STR137## is 2,5-pyrimidinediyl and X and Y are a single bond or M is ##STR138## in which X is a single bond, and both of rings ##STR139## are p-phenylene; and the carbon atoms with the asterisk (*) denote asymmetric carbon atoms.
Claim 2
Dependent Claim
176 words
An optically active compound represented by the formula: ##STR132## wherein R 1 is a straight chain alkyl group of 6 to 12 carbon atoms or a straight chain alkenyl group of 6 to 12 carbon atoms; R 2 and R 3 are independently a lower alkyl group of 1 to 3 carbon atoms; R 4 is a straight chain alkyl group of 1 to 8 carbon atoms; Q 1 is a single bond, an ether bond or a --C(═O)--O-- ester bond; Q 2 and Q 3 are independently a carboxylic acid ester bond or an ether bond; M is ##STR133## in which one of X and Y is a single bond, the other is a carboxylic acid ester bond, and all rings ##STR134## are p-phenylene or ring ##STR135## and ring ##STR136## are p-phenylene and ring ##STR137## is 2,5-pyrimidinediyl and X and Y are a single bond or M is ##STR138## in which X is a single bond, and both of rings ##STR139## are p-phenylene; and the carbon atoms with the asterisk (*) denote asymmetric carbon atoms.
Claim 3
Dependent Claim
17 words
An optically active compound according to claim 1 in which R 2 and R 3 are methyl.
Claim 4
Dependent Claim
21 words
Optically active compounds according to claim 1, wherein M is ##STR140## X is a single bond; both of ##STR141## are p-phenylene.
Claim 5
Dependent Claim
59 words
An optically active compound according to claim 1, wherein R 1 is an alkyl group of 3-14 carbon atoms; R 2 and R 3 are methyl; R 4 is an alkyl group of 3 to 4 carbon atoms; Q 1 and Q 2 are an ether group, Q 3 is an ether group or a carboxylic acid ester group.
Claim 6
Dependent Claim
31 words
An optically active compound according to claim 4, wherein R 1 is n--C 8 H 17 , and X is a carboxylic acid ester group, and Y is a single bond.
Claim 7
Dependent Claim
22 words
An optically active compound according to claim 5, wherein said optically active compound is one selected from the group consisting of ##STR142##
Claim 8
Dependent Claim
15 words
An optically active compound according to claim 6, wherein said optically active compound is ##STR143##
Claim 9
Dependent Claim
30 words
An optically active compound according to claim 4, wherein R 1 is n--C 8 H 17 and X is a single bond and Y is a thiocarboxylic acid ester group.
Claim 10
Dependent Claim
14 words
An optically active compound according to claim 8, wherein said active compound is ##STR144##
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US4959173A
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EP0322862A2
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |