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US 5,279,764 AGranted
Dihalogenobenzene derivatives
AssigneeMerck Patent GmbH
InventorsVolker Reiffenrath, Joachim Krause, Georg Weber, Ulrich Finkenzeller, Andreas Wachtler, Thomas Geelhaar, David Coates, Ian C. Sage, Simon Greenfield
Life of this patent
Estimating the term…
Abstract
The invention relates to dihalogenobenzene derivatives of the formula I R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --(Z.sup.2 --A.sup.3).sub.n --R.sup.2 wherein R.sup.1, R.sup.2, A.sup.1, A.sup.2, A.sup.3, Z.sup.1, Z.sup.2 and n are as defined in the specification.
Claims11
A 2,3-difluorobenzene derivative of the formula
- R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --Z.sup.2 --A.sup.3 --R.sup.2
- wherein
- R.sup.1 and R.sup.2 are each independently C.sub.1-15 -alkyl;
- C.sub.1-15 -alkyl wherein at least one CH.sub.2 group is replaced by --O--, --S--, --CO--, --O--CO--, --S--CO--, --O--COO--, --CO--S--, --CO--O-- or --E--, two oxygen or sulfur atoms not being linked directly,
- E is CR.sup.3 .dbd.CR.sup.4
- R.sup.3 and R.sup.4 are each independently H, C.sub.1-6 -alkyl, F, Cl, Br, CF.sub.3 or CN,
- Z.sup.1 is --CH.sub.2 CH.sub.2 --,
- Z.sup.2 is a single bond,
- A.sup.1, A.sup.2 and A.sup.3 are each independently 1,4-phenylene;
- 1,4-phenylene substituted by one or more halogen, nitrile and/or methyl,
- with the proviso that at least the ring A.sup.1 is 2,3-difluoro-1,4-phenylene.
8 more elements
Dependencies are inferred from the claim text.