Claims
- 1. Optically active compounds of the formula I
- R.sup.1 --C*HX--Q--A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --X'--Q'--C*HY'--R.sup.5 (I)
- wherein
- R.sup.1 --C*HX--Q-- and --X'--Q'--C*HY--R.sup.5 are identical optically active radicals selected from the group --O--C*HCH.sub.3 --COO--n-- alkyl, --O--C*HCH.sub.3 --CH.sub.2 --O--n--alkyl, --COO--C*HCH.sub.3 --COO--n--alkyl, --O--CO--C*HCH.sub.3 --O--n--alkyl, --OCH.sub.2 --C*HCH.sub.3 --O--n--alkyl, --COO--C*HCH.sub.3 --CH.sub.2 --O--n--alkyl, --OC*HCH.sub.3 --CH.sub.2 --COO--n--alkyl, --COO--C*HCH.sub.3 --CH.sub.2 --COO--n--alkyl, --OCH.sub.2 --C*HCH.sub.3 --COO--n--alkyl or --COO--CH.sub.2 --C*HCH.sub.3 --COO--n--alkyl,
- alkyl is of 1-12 C atoms,
- and --A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n -- is a group of the following formulae. ##STR11##
- 2. An optically active compound according to claim 1, of the formula
- C.sub.3 H.sub.7 --OOC--C*HCH.sub.3 --O--A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --OC*HCH.sub.3 --COO--C.sub.3 H.sub.7,
- C.sub.3 H.sub.7 --O--CH.sub.2 --C*HCH.sub.3 --O--A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --OC*HCH.sub.3 --CH.sub.2 O--C.sub.3 H.sub.7,
- C.sub.2 H.sub.5 --OOC--C*HCH.sub.3 --OOC--A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --COO--C*CHCH.sub.3 --COO--C.sub.2 H.sub.5,
- C.sub.2 H.sub.5 --O--C*HCH.sub.3 --COO--A.sup.4 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --OOC--C*HCH.sub.3 --O--C.sub.2 H.sub.5, or
- C.sub.2 H.sub.5 --O--C*HCH.sub.3 --CH.sub.2 --O--A.sup.4 --A.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --O--CH.sub.2 --C*HCH.sub.3 --O--C.sub.2 H.sub.5.
- 3. An optically active compound according to claim 1, which is
- 4,4'-bis-(.alpha.-pentyloxypropanoyloxy)-biphenyl,
- 4,4'-bis-(.alpha.-butyloxypropanoyloxy)-biphenyl,
- 4,4'-bis-(.alpha.-propyloxypropanoyloxy)-biphenyl, or
- 4,4'-bis-(.alpha.-ethyloxypropanoyloxy)-biphenyl.
- 4. A chiral tilted smectic liquid crystal phase with at least two liquid crystal components, containing at least one optically active compound of the formula I according to claim 1.
- 5. Electrooptical display element comprising a liquid crystal dielectric, wherein a phase according to claim 4 is the dielectric.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3604905 |
Feb 1986 |
DEX |
|
3630771 |
Sep 1986 |
DEX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/116,944, filed Oct. 17, 1987 now abandoned.
US Referenced Citations (21)
Foreign Referenced Citations (8)
Number |
Date |
Country |
164814 |
Dec 1985 |
EPX |
225195 |
Jun 1987 |
EPX |
3515373 |
Nov 1986 |
DEX |
3515374 |
Nov 1986 |
DEX |
240385 |
Oct 1986 |
DDX |
240386 |
Oct 1986 |
DDX |
58-46040 |
Mar 1983 |
JPX |
62-181238 |
Aug 1987 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
116944 |
Oct 1987 |
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