4-bromo-6-chloro-5-amino-2-pyridyl-ethanolamines and their use as yield promoters

摘要

4-Bromo-6-chloro-5-amino-2-pyridyl-ethanolamines, intermediates for preparation thereof and their use as yield promoters for animals and as feedstuff additives to achieve higher increases in weight and improved feed utilization of the formula ##STR1## in which R. sup.1 stands for hydrogen, alkyl, acyl or substituted silyl,P PR.sup.2 stands for hydrogen or alkyl,PPR.sup.3 stands for hydrogen, alkyl, cycloalkyl, substituted alkyl, optionally substituted aralkyl, aryl or heterocyclyl, orPPR.sup.2 and R.sup.3, together with the nitrogen atom to which they are bonded, can stand for an optionally substituted heterocyclic radical,P PR.sup.4 stands for hydrogen or alkyl andPPR.sup.5 stands for hydrogen, alkyl, halogenoalkyl or acyl, and their physiologically tolerated salts and their N-oxides have been found.