| abstract |
The present invention relates to substituted pyridylethanolamines of the formula I. in which R¹ represents CN, -COOR⁸, -CONR⁹R¹⁰, R² represents optionally substituted alkyl, R³ represents hydrogen, alkyl or alkenyl, R⁴ represents hydrogen, optionally substituted alkyl or alkenyl, R³ and R⁴ together with the nitrogen atom to which they are attached represent an optionally substituted heterocyclic radical, R⁵ represents OH, acyloxy or alkoxy, R⁶ represents hydrogen or alkyl, R⁷ represents hydrogen, alkyl, cycloalkyl, substituted alkyl, optionally substituted aralkyl, aryl or heterocyclyl, R⁶ and R⁷ together with the nitrogen atom to which they are attached can represent an optionally substituted heterocyclic radical, R⁸ represents alkyl, R⁹ and R¹⁰ independently represent hydrogen, alkyl, alkenyl or together with the nitrogen atom to which they are attached represent an optionally substituted heterocyclic radical.n n n Processes for their preparation and intermediate products for carrying out these processes. The substituted pyridylethanolamines serve as performance enhancers in animals. |