Oxaxoline derivatives

Details Oxaxoline derivatives Oxaxoline derivatives

1992-09-17

1994-11-01

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229963, 25229966, 25229967, 548237, C09K 1934, C09K 1930, C09K 1920, C07D 2610

Patent

active

053605772

ABSTRACT:
Optically active compounds of the general formula ##STR1## wherein n stands for the number 0 or 1; R.sup.3 denotes a group R.sup.4 or a group of the general formula ##STR2## A.sup.1, A.sup.2 and A.sup.3 each independently represent 1,4-phenylene, which is unsubstituted or mono- or multiply-substituted with halogen, cyano and/or methyl and in which, where it is unsubstituted, 1 or 2 CH groups is/are optionally replaced by nitrogen, trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, bycyclo[2.2.2]octane-1,4-diyl, naphthalene-2,6-diyl, tetralin-2,6-diyl or trans-decalin-2,6-diyl; Z.sup.1 and Z.sup.4 each independently signify a single covalent bond or --CH.sub.2 CH.sub.2 --; Z.sup.2 and Z.sup.3 each independently denote a single covalent bond, --CH.sub.2 CH.sub.2 --, --COO--, --OOC--, --CH.sub.2 O--, --OCH.sub.2 --, --C.tbd.C--, --(CH.sub.2).sub.4 --, --(CH.sub.2).sub.3 O--, --O(CH.sub.2).sub.3 -- or the trans form of --CH.dbd.CH--CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 --CH.dbd.CH--, --CH.dbd.CH--CH.sub.2 O-- or --OCH.sub.2 --CH.dbd.CH--; R.sup.1 and R.sup.5 each independently signify alkyl with 1 to 12 carbon atoms, alkoxymethyl with 2 to 12 carbon atoms, p-alkoxyphenyl or p-alkoxybenzyl; R.sup.2 and R.sup.6 each independently signify hydrogen, alkyl with 1 to 12 carbon atoms or phenyl; R.sup.4 denotes hydrogen, halogen, cyano, trifluoromethyl, trifluoromethoxy or alkyl or alkenyl with 1 to 12 and, respectively, 2 to 12 carbon atoms, which are unsubstituted or mono- or multiply-substituted with halogen, cyano and/or methyl and in which one methylene group or two non-adjacent methylene groups can be replaced by --O--, --COO-- and/or --OOC--; and the oxazoline ring in formula I is present in optically active form, liquid crystalline mixtures which contain such dopants and their use for optical and electro-optical purposes.

REFERENCES:
patent: 4264148 (1981-04-01), Gobl-Wunsch et al.
patent: 5159084 (1992-10-01), Shoshi
"Synthesis of Optically Active Bis(2-oxazolines): Crystal Structure of 1,2-Bis-(2-oxazolinyl)benzene.ZnCl.sub.2 Complex", Bolm et al.
Chem. Ber. 124, 1173-1180 (May 1991).
Derwent Abstract E13 L03 U11 V07 (1987) for DE-3744024.
Derwent Abstract E15 L03 U11 V07 (E14) (1989) for JP-027517.
Derwent Abstract E19 L03 (1989) for JP-023693.
Derwent Abstract AB9 E14 L03 (E13 E24) (1989) for DE-904797.
Derwent Abstract E13 L03 (E16) (1987) for JP-242077.
Derwent Abstract A32 E13 F01 (A23) (1986) for JP-017325.

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