Oblon, Spivak, McClelland, Maier & Neustadt
Heterocyclic amidine derivatives
 Heterocyclic amidine derivatives of the general formula I ##STR1## in which the variables R.sup.1 are the same or different and denote hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, hydroxyl or chlorine, PA1 R.sup.2 to R.sup.5 denote hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.3 and R.sup.4 can together form a five-membered or six-membered ring, PA1 R.sup.6 denotes hydrogen or C.sub.1 -C.sub.8 -alkyl, PA1 R.sup.7 denotes cyano or --COOR.sup.8, --COR.sup.8, --CONHR.sup.8 or --CONR.sup.8.sub.2, in which PA2 R.sup.8 is a straight-chain or branched-chain C.sub.1 -C.sub.12 -alkyl group which may be interrupted by oxygen atoms, a cyclopentyl or cyclohexyl group or a phenylalkyl group having from 1 to 3 carbon atoms in the alkyl moiety, PA1 A is a chemical bond or a methylene group which may additionally carry one or two C.sub.1 -C.sub.4 -alkyl radicals, and PA1 m and n are each 1 or 2. The said heterocyclic amidine derivatives I serve as UV stabilizers for organic materials. 
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C C C C C C C C C
C08K C07D C07D C08K C07D C07D C07D C07D C07D
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Peter Hubert Peter
Spang Trauth Neumann