Patent number: 4704227
Abstract: Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 IwhereinR.sup.1 and R.sup.2 are each H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 --,A.sup.1 is --A--, --A.sup.4 --A--or --A--A.sup.4 --,A is a 1,3-dioxane-2,5-diyl or a 1,3-dithiane-2,5-diyl group,A.sup.2, A.sup.3 are each a 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl,and A.sup.4 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl or 1,4-bicyclo(2,2,2)octylene group, or a 1,4-phenylene, pyrimidine-2,5-diyl or pyridazine-3,6-diyl group which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 groups and/or CN groups,Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O or a single bond andR.sup.3 is H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br or CN, with the proviso that(a) at least one group A.sup.2, A.sup.
Type:
Grant
Filed:
February 15, 1985
Date of Patent:
November 3, 1987
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung
Inventors:
Joachim Krause, Andreas Wachtler, Reinhard Hittich, Georg Weber, Bernhard Scheuble