| abstract |
Process for the racemization of optically active amines of the formula I. in which R 1 and R 2 are different and R 1 , R 2 , R 3 are alkyl, cycloalkyl, arylalkyl, aryl, heteroaryl radicals and heterocyclic radicals and R 3 can additionally be hydrogen (H), the radicals being substituents , selected from the group alkyl, cycloalkyl, alkoxy, aryloxy, amino, alkylamino and dialkylamino, by reaction of the optically active amine I in the presence of hydrogen and a hydrogenation or dehydrogenation catalyst at elevated temperature, the catalyst being the active components copper and Contains zinc oxide and a carrier material. |