Compound, rubber blend containing the compound, vehicle tire comprising the rubber blend in at least one component, process for producing the compound, and use of the compound as an ageing protectant and/or antiozonant and/or dye

A compound of formula I):

• wherein R1 is selected from the group consisting of
• xi) aromatic radicals, wherein the aromatic radicals optionally bear substituents selected from the group consisting of halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals,
• and xii) linear, branched and cyclic aliphatic C1- to C12-radicals,
• and xiii) combinations of aromatic and aliphatic C1- to C12-radicals;
• and wherein R2 is selected from the group consisting of linear, branched and cyclic, saturated and unsaturated, aliphatic C1- to C12-radicals optionally bearing one or more halogen substituents, aryl radicals optionally bearing one or more halogen substituents, and halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals;
• and
• wherein m assumes the value 0 or 1 or 2 or 3, wherein when m is 2 or 3 the radicals R2 are independently of one another identical or different;
• and wherein R3 is selected from the group consisting of linear, branched and cyclic, saturated and unsaturated, aliphatic C1- to C12-radicals optionally bearing one or more halogen substituents, aryl radicals optionally bearing one or more halogen substituents and halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals and wherein n assumes the value 0 or 1.

A process for producing the compound of formula I) which comprises the following process steps:

• a) providing the compound of formula A)
• b) optionally reacting the compound of formula A) with hydrogen to afford the compound of formula B)
• c) reacting the compound of formula A) or formula B) with hydrogen or a hydrogenating reagent and a ketone or aldehyde to afford the compound of formula I)
• wherein R1 is selected from the group consisting of
• xi) aromatic radicals, wherein the aromatic radicals optionally bear substituents selected from the group consisting of halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals,
• and xii) linear, branched and cyclic aliphatic C1- to C12-radicals,
• and xiii) combinations of aromatic and aliphatic C1- to C12-radicals;
• and wherein R2 is selected from the group consisting of linear, branched and cyclic, saturated and unsaturated, aliphatic C1- to C12-radicals optionally bearing one or more halogen substituents, aryl radicals optionally bearing one or more halogen substituents, and halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals;
• and
• wherein m assumes the value 0 or 1 or 2 or 3, wherein when m is 2 or 3 the radicals R2 are independently of one another identical or different;
• and
• wherein R3 is selected from the group consisting of linear, branched and cyclic, saturated and unsaturated, aliphatic C1- to C12-radicals optionally bearing one or more halogen substituents, aryl radicals optionally bearing one or more halogen substituents and halogen radicals, cyano radicals, ester radicals, ketone radicals, ether radicals and thioether radicals and wherein n assumes the value 0 or 1.