Phenylcyclohexanes and a liquid-crystalline medium
AssigneeMerck Patent Gesellschaft mit beschrankter
InventorsAndreas Wachtler, Reinhard Hittich, Eike Poetsch, Herbert Plach, David Coates, Bernhard Rieger, Joachim Krause
Life of this patent
Estimating the term…
Abstract
Novel phenylcyclohexanes of the formula I ##STR1## in which n is 0 to 7, Q.sup.1 and Q.sup.2 are H, or one of these radicals is alternatively CH.sub.3, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, --CF.sub.3, --CN, --OCF.sub.3 or --OCHF.sub.2, and Y and Z are each, independently of one another, H or F, with the proviso that, in the case where A is a single bond, Q.sup.1 =Q.sup.2 =H and simultaneously X=CN, Y and/or Z are F.
Claims3
A phenylcyclohexane of formula I ##STR21## in which n is 0 to 7, Q.sup.1 and Q.sup.2 are H, or one of these radicals is alternatively CH.sub.3, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is --CN, Y is F and Z is H or F.
A phenylcyclohexane of formula I ##STR22## in which n is 0 to 7, Q.sup.1 and Q.sup.2 are H, or one of these radicals is alternatively CH.sub.3, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, --CF.sub.3 or --OCF.sub.3 and Y and Z are each F.
A phenylcyclohexane of formula I ##STR23## in which n is 0 to 7, Q.sup.1 and Q.sup.2 are H, or one of these radicals is alternatively CH.sub.3, r is 0, 1 or 2, A is trans-1 ,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, and Y and Z are both F.
Dependencies are inferred from the claim text.