Claims
- 1. An optically active naphthalene derivative represented by the formula ##STR62## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes --COO-- or --OCO--, k, l and m denotes 0 or 1 respectively, n denotes an integer of 0-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom, proviso when k is 0, l and m are not 1 at the same time, when k is 1, m is 1, when k is 1 and p is 1, n is an integer of 4 to 6, and when n is 0 and m is 1, X is --COO--.
- 2. An optically active naphthalene derivative according to claim 1 wherein n is 4 or 5.
- 3. An optically active naphthalene derivative according to claim 1 wherein k and m are 0, l and p are 1.
- 4. An optically active naphthalene derivative according to claim 1 wherein k, m and p are 0, and l is 1.
- 5. An optically active naphthalene derivative according to claim 1 wherein k, m and p are 0, l is 1 and n is 4.
- 6. An optically active naphthylcarboxylic acid derivative represented by the formula (II) ##STR63## wherein R' denotes an hydroxyl group or a halogen atom, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s)or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), n' denotes an integer of 1-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom.
- 7. An optically active hydroxynaphthalene derivative represented by the formula (V) ##STR64## wherein R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), n denotes an integer of 4-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom.
- 8. An optically active alkoxynaphthylalkanol derivative represented by the formula (VIII) ##STR65## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, n denotes an integer of 4-6 and an asterisk indicates an asymmetric carbon atom.
- 9. An optically active alkylnaphthyl alkanol derivative represented by the formula (XI) ##STR66## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, n denotes an integer of 4-6, and an asterisk indicates an asymmetric carbon atom.
- 10. A liquid crystal composition which contains as an effective component at least one optically active naphthalene derivative represented by the formula (I) ##STR67## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes --COO-- or --OCO--, k, l and m denotes 0 or 1 respectively, n denotes an integer of 4-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom, proviso when k is 0, l and m are not 1 at the same time, when k is 1, m is 1, and when n is 0 and m is 1, X is --COO--.
- 11. A liquid crystal element formed by using a liquid crystal composition which contains as an effective component at least one optically active naphthalene derivative represented by the formula (I) ##STR68## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes --COO-- or --OCO--, k, l and m denotes 0 or 1 respectively, n denotes an integer of 4-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom, proviso when k is 0, l and m are not 1 at the same time, when k is 1, m is 1, and when n is 0 and m is 1, X is --COO--.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1-234382 |
Sep 1989 |
JPX |
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2-056188 |
Mar 1990 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/577,656, filed Sep. 5,1990, now abandoned.
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Continuations (1)
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Number |
Date |
Country |
Parent |
577565 |
Sep 1990 |
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