PYRIMIDINE DERIVATIVES AS PERFORMANCE STIMULATING AGENTS

摘要

Novel pyrimidine derivatives of the formula I in which R<1> represents hydrogen, alkyl or acyl, R<2> represents hydrogen or alkyl, R<1> and R<2>, together with the nitrogen atom to which they are bonded, can form a saturated or unsaturated 5-membered ring or 6-membered ring which can additionally contain other hetero atoms, R<3> represents hydrogen, alkyl or acyl, R<4> represents hydrogen, alkyl or haloalkyl, R<5> represents alkyl or haloalkyl, R<6> represents alkyl or cycloalkyl, which are optionally substituted by halogen, cycloalkyl, hydroxyl, alkoxy, haloalkoxy or aryl which can in turn be substituted by alkyl, halogen, hydroxyl, alkoxy, alkylenedioxy, CN or the radicals -COR<7>, -O-alkylene-COR<7>, alkylene-R<8> or O-alkylene-R<8>, R<7> represents hydroxyl, alkoxy or -NR<9>R<1><0>, R<8> represents hydroxyl, alkoxy or -NR<9>R<1><0>, R<9> represents hydrogen or alkyl, R<1><0> represents hydrogen or alkyl, and their tautomeric forms in the case in which at least one of the radicals R<1> or R<2> represents hydrogen, and physiologically tolerable salts and their preparation. The compounds of the formula I are used as performance stimulating agents for animals.