Patent EP-0481300-A2 (EP)
Inventor: AUMUELLER ALEXANDER DR
IPC: C07D401/12
Filed: 1991-10-04
Abstract: Polyalkylpiperidine derivatives of the general formula I 
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 in which 
 
  R<1> signifies hydrogen, C1- to C8-alkyl, phenyl- or tolylalkyl having 1 to 4 C atoms in the alkyl group, C1- to C6-acyl, benzoyl, allyl, cyanomethyl, hydroxyethyl, aminoethyl, hydroxyl or the oxyl radical, 
  R<2> represents a radical of the formula (a) 
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 a radical of the formula (b) 
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 or a radical of the formula (c) 
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 in which 
  R<4> and R<5> denote hydrogen, C1- to C22-alkyl, C3- to C22-alkenyl, C7- to C22-phenyl- and diphenylalkyl, where the phenyl ring can be unsubstituted or monosubstituted to trisubstituted by C1- to C12-alkyl, C1- to C12-alkoxy, fluorine, chlorine, bromine, C1- to C12-alkylamino or C1- to C12-dialkylamino, denote C3- to C12-cycloalkyl, C3- to C22-alkyl interrupted by ether oxygen atoms or nitrogen atoms and which can additionally carry hydroxyl groups, phenyl which can be unsubstituted or monosubstituted to tetrasubstituted by C1- to C12-alkyl, C3- to C12-cycloalkyl, C1- to C12-alkoxy, chlorine, bromine, C1- to C12-alkylamino, C1- to C12-dialkylamino, phenyl, benzyl, hydroxyl or cyano, or denote a 5- or 6-membered aromatic heterocycle, with the proviso that at least one of the radicals R<4> or R<5> is an aromatic radical, and 
  R<6> signifies hydrogen, C1- to C22-alkyl, C2- to C22-alkenyl, C7- to C22-phenyl- and diphenylalkyl, where the phenyl ring can be unsubstituted or monosubstituted to trisubstituted by C1 to C12-alkyl, C1- to C12-alkoxy, chlorine, bromine, C1- to C12-alkylamino, C1- to C12-dialkylamino, hydroxyl, cyano or C1- to C12-carboalkoxy, signifies phenyl which can be unsubstituted or monosubstituted to trisubstituted by C1- to C12-alkyl, C1- to C12-alkoxy, chlorine, bromine, phenyl, C1- to C12-alkylamino, C1- to C12-dialkylamino, hydroxyl, cyano, C1- to C12-carbonyloxy or C1- to C12-carboalkoxy, or signifies C3- to C12-cycloalkyl, pyridyl or C2- to C22-alkyl interrupted by carbonyloxy or signifies a radical of the formula 
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 in which 
  A denotes C2- to C22-alkylene, C8- to C22-cycloalkylene, C8- to C16-phenylalkylene, phenylene or C4- to C30-alkylene interrupted by ether oxygen atoms, nitrogen atoms or 5- or 6-membered heterocycles, and 
  R<3> signifies hydrogen, C1- to C22-alkyl, C3- to C22-alkenyl, C7- to C22-phenyl- and diphenylalkyl, where the phenyl ring can be unsubstituted or monosubstituted to trisubstituted by C1- to C12-alkyl, C1- to C12-alkoxy, fluorine, chlorine, bromine, C1- to C12-alkylamino or C1- to C12-dialkylamino, signifies C3- to C12-cycloalkyl or bicycloalkyl, C4-to C22-alkyl interrupted by ether oxygen atoms or nitrogen atoms and which can additionally carry hydroxyl groups, phenyl which can be substituted by one to three methyl or carbo-C1-C12-alkoxy groups, C1- to C22-alkyl containing heterocyclic radicals, a radical of the formula 
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 or in the presence of the radical (a) for R<2> signifies a radical of the formula 
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 or in the presence of the radical (b) for R<2> signifies a radical of the formula 
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 or in the presence of the radical (c) for R<2> signifies a radical of the formula 
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 where 
  R<7> denotes hydrogen, C1- to C22-alkyl, C2- to C22-alkenyl, C7- to C22-phenyl- and diphenylalkyl, where the phenyl ring can be unsubstituted or monosubstituted to trisubstituted by C1- to C12-alkyl, C1- to C12-alkoxy, chlorine, bromine, C1- to C12-alkylamino, C1- to C12-dialkylamino, hydroxyl, cyano or C1- to C12-carboalkoxy, denotes phenyl which can be unsubstituted or monosubstituted to trisubstituted by C1- to C12-alkyl, C1- to C12-alkoxy, chlorine, bromine, phenyl, C1- to C12-alkylamino, C1- to C12-dialkylamino, hydroxyl, cyano, C1- to C12-carbonyloxy or C1- to C12-carboalkoxy, or denotes C3- to C12-cycloalkyl, pyridyl or C2- to C22-alkyl interrupted by carbonyloxy, 
 and tautomers and acid addition salts of the compounds I. 
<??>The compounds I are used as light stabilisers and stabilisers for organic material.