Decalins
AssigneeHoffmann-La Roche Inc.
InventorsMartin Petrzilka, Kuno Schleich
Life of this patent
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Abstract
Decalins of the formula ##STR1## wherein ring A is aromatic or a trans-1,4-disubstituted cyclohexane ring; R.sup.2 is methyl, --CH.sub.2 R', --OR', --CO--R', --CN, --COOH, --CO--OR', --CO--SR' or --O--CO--R'; R.sup.1 is hydrogen, methyl, --CH.sub.2 R, --OR or --CH.sub.2 OR, or when R.sup.2 is methyl, --CH.sub.2 R', --OR' or --CO--R', R.sup.1 also can be --CN, --COOH, --CO--OR, --CO--SR or --O--CO--R; R and R' each are alkyl; and R.sup.1 and R.sup.2 each have up to 12 carbon atoms and together have at most 14 carbon atoms, their racemates and optically active antipodes, are described. Liquid crystalline mixtures comprising Compound I as well as their use in electro-optical devices also are disclosed.
Claims18
A compound of the formula ##STR47## wherein R.sup.1 is hydrogen, methyl, --CH.sub.2 R, --OR or --CH.sub.2 OR, R is alkyl;
- and R.sup.1 has up to 12 carbon atoms,
- its racemates or its optically active antipodes.
An electro-optical cell containing a compound of the formula ##STR48## wherein R.sup.1 is hydrogen, methyl, --CH.sub.2 R, --OR or --CH.sub.2 OR, R is alkyl;
- and R.sup.1 has up to 12 carbon atoms,
- its racemates or its optically active antipodes.
A liquid crystalline mixture comprising at least two compounds at least one being a compound of the formula ##STR49## wherein R.sup.1 is hydrogen, methyl, --CH.sub.2 R, --OR or --CH.sub.2 OR, R is alkyl;
- and R.sup.1 has up to 12 carbon atoms,
- its racemates or its optically active antipodes.
Dependencies are inferred from the claim text.