申请人:Bayer Aktiengesellschaft
公开号:US04988694A1
公开(公告)日:1991-01-29
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, R.sup.2 stands for hydrogen or alkyl, R.sup.3 stands for hydrogen, alkyl, cycloalkyl, substituted alkyl, optionally substituted aralkyl, aryl or heterocyclyl, or R.sup.2 and R.sup.3, together with the nitrogen atom to which they are bonded, can stand for an optionally substituted heterocyclic radical, R.sup.4 stands for hydrogen or alkyl and R.sup.5 stands for hydrogen, alkyl, halogenoalkyl or acyl, and their physiologically tolerated salts and their N-oxides have been found.
4-溴-6-氯-5-氨基-2-吡啶基-乙醇胺,其制备中间体以及其作为动物产量促进剂和饲料添加剂的用途,以实现体重增加和改善饲料利用效率。其中R.sup.1代表氢、烷基、酰基或取代硅烷基,R.sup.2代表氢或烷基,R.sup.3代表氢、烷基、环烷基、取代烷基、可选取代芳基、芳基或杂环烷基,或R.sup.2和R.sup.3,连同它们结合的氮原子,可以代表一个可选取代的杂环基,R.sup.4代表氢或烷基,R.sup.5代表氢、烷基、卤代烷基或酰基,已经被发现其生理耐受的盐和它们的N-氧化物。