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US 5,204,477 AGranted
Pyridine derivatives in liquid crystalline medium useful for electrooptical display elements
AssigneeMerck Patent GmbH
InventorsVolker Reiffenrath, Eike Poetsch, Volker Meyer, Herbert Plach
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Abstract
The invention relates to pyridine derivatives of the formula I ##STR1## wherein R.sup.1, A, Z, r, X, s and R.sup.2 have the meaning given in claim 1, and their use as components for liquid crystal media for electrooptical display elements based on the ECB effect.
Claims2
A pyridine derivative of the Formulae Ia-Ir:
- ##STR46## wherein R.sup.1 is a straight-chain alkyl, alkoxy, alkenyl, or oxaalykyl group with up to 15 C atoms in the alkyl residue, and
- R.sup.2 is alkyl, alkenyl, oxaalykyl, or alkylcarbonyl with up to 15 C atoms in the alkyl residue.
Dependencies are inferred from the claim text.