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US 6,284,154 B1Granted
Phenylcyclohexanes and a liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsAndreas Wächtler, 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 in which n is 0 to 7, Q1 and Q2 are H, or one of these radicals is alternatively CH3, 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, —CF3, —CN, —OCF3 or —OCHF2, 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, Q1═Q2═H and simultaneously X═CN, Y and/or Z are F.
Claims13
A phenylcyclohexane of formula I
- in which n is 0 to 7, Q1 and Q2 are H, or one of these radicals is alternatively CH3, r is 0, 1 or 2, A is 1,4-phenylene or 3-fluoro-1,4-phenylene, X is —CN, Y is H or F and Z is H or F, with the proviso that if A is 1,4-phenylene, Q1 and Q2 are H and at least one of Y and Z is F.
Dependencies are inferred from the claim text.