Liquid crystalline cyclohexane derivatives
AssigneeMerck Patent GmbH
InventorsJoachim Krause, Rudolf Eidenschink, Ludwig Pohl
Life of this patent
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Abstract
Cyclohexane derivatives of the formula ##STR1## wherein the rings A and B are identical or different and are each a 1,4-disubstituted phenyl or cyclohexyl ring; X is --CO--O -- or --O--CO--; R.sub.1 is alkyl of 1-8 carbon atoms; and R.sub.2 is alkyl of 1-8 carbon atoms, and when the ring B is phenyl, R.sub.2 is alkyl, alkoxy or alkanoyloxy, each of up to 8 carbon atoms, or --CN, have valuable liquid crystalline properties.
Claims12
A cyclohexane derivative of the formula ##STR18## wherein the rings A and B are identical or different and are each a 1,4-disubstituted phenyl or 1,4-trans-disubstituted cyclohexyl ring;
- X is --CO--O-- or --O--CO--;
- R.sub.1 is alkyl of 1-8 carbon atoms;
- and R.sub.2 is alkyl of 1-8 carbon atoms, and when the ring B is phenyl, R.sub.2 is alkyl, alkoxy or alkanoyloxy, each of up to 8 carbon atoms, or --CN.
Dependencies are inferred from the claim text.