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US 5,205,962 AGranted
Pyridine derivatives
AssigneeMerck Patent GmbH
InventorsDavid Coates, Simon Greenfield, Ian C. Sage, Robert Clemitson, Herbert Plach, Volker Reiffenrath
Life of this patent
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Abstract
The invention relates to pyridine derivatives of the formula I ##STR1## wherein R.sup.1, A.sup.1, E.sup.1, n, A.sup.2, Z.sup.2, X and Y have the meaning given in claim 1.
Claims15
Pyridine derivatives of the formula I ##STR12## wherein R.sup.1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH.sub.2 -groups may also be replaced by --O--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--,
- Y is F, Cl, --CF.sub.3, --OCF.sub.3 or OCHF.sub.2,
- A.sup.1 and A.sup.2 in each case independently of one another are trans-1,4-cyclohexylene, wherein one or two non-adjacent CH.sub.2 -groups may also be replaced by --O-- or --S--, or 1,4-phenylene which is unsubstituted or substituted by one or more halogen atoms and/or nitrile and/or CH.sub.3 groups, and wherein one or more CH groups may also be replaced by N,
- Z.sup.1 and Z.sup.2 in each case independently of one another are --CH --CO--O--, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 --, --C.tbd.C-- or a single bond,
- X is H, or in case of Y=F or Cl, also F and
- n is 0, 1 or 2.
2 more elements
Dependencies are inferred from the claim text.