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US 4,834,904 AGranted
Nitrogen-containing heterocycles
AssigneeMerck Patent GmbH
InventorsJoachim Krause, Rudolf Eidenschink, Klaus Bofinger, Bernhard Scheuble, Thomas Geelhaar
Life of this patent
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Abstract
Optically active nitrogen-containing heterocycles of the formula I according to claim 1 are suitable as components for ferroelectric liquid crystalline materials.
Claims10
A nitrogen-containing heterocycle of the formula ##STR24## in which R.sup.1 is an alkyl or alkoxy group of 1-15 carbon atoms,
- A.sup.1 is pyrimidine-2,5-diyl or pyridine-2,5-diyl,
- A.sup.2 is 1,4-phenylene which is unsubstituted or substituted by one F atom,
- X is 13 O--CO-- or --O-- when A.sup.1 is pyridine-2,5-diyl and --O--CO-- when A.sup.1 is pyrimidine-2,5-diyl,
- Q is --CH.sub.2 -- or a single bond,
- Y is halogen, and
- is an alkyl group of 1 to 10 carbon atoms.
3 more elements
Dependencies are inferred from the claim text.