| 摘要 |
Compounds of the general formula I <IMAGE> (I) or their acid addition salts in which one of R1 and R3 is -OH and the other is hydrogen and R2 denotes C1-C12-alkyl, C5-C7-cycloalkyl, C6-C10-aryl or C7-C9-aralkyl and R4 and R5 are hydrogen, C1-C12-alkyl, C5-C7-cycloalkyl, C6-C10-aryl or C7-C9-aralkyl and R6 denotes hydrogen, C1-C12-alkyl, C5-C7-cycloalkyl, phenyl or benzyl and R7 is hydrogen or C1-C8-alkyl and R8 is hydrogen, oxyl, C1-C12-alkyl, C3-C6-alkenyl, C3-C4-alkinyl, C2-C21-alkoxyalkyl, C7-C8-aralkyl, 2,3-epoxypropyl, an aliphatic acyl group with 1-4 C atoms or one of the groups -CH2COOR9, -CH2-CH(R10)-OR11, -COOR12 or - CONHR12, in which R9 is C1-C12-alkyl, C3-C6-alkenyl, phenyl, C7-C8-aralkyl or cyclohexyl and R10 is hydrogen, methyl or phenyl and R11 denotes hydrogen or an aliphatic or aromatic, araliphatic or alicyclic acyl group with 1-18 C atoms, in which the aromatic part can optionally be substituted by chlorine, C1-C4-alkyl or C1-C8-alkoxy and/or by hydroxyl, or a group <IMAGE> and R12 denotes C1-C12-alkyl, cyclohexyl, phenyl or benzyl and X is -O- or -NR13-, in which R13 denotes hydrogen, C1-C12-alkyl, C5-C7-cycloalkyl or C7-C9-aralkyl and A is one of the groups -(CnH2n)-, which can optionally be interrupted by -S- or <IMAGE> in which n denotes 0 to 12 and Y is one of the groups <IMAGE> in which R7, R8 and X have the meaning defined above and R14 denotes C1-C12-alkyl, phenyl or tolyl as stabilizers for organic material.
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