N,N'-Bis[2-(3-substituted-4-hydroxyphenyl)-ethyl or-2-hydroxyethyl]-polymethylenediamines having .beta.-adrenergic stimulant activity particularly as selective bronchodilators, are prepared generally by condensation of an N-benzylphenethylamine with a polymethylene dihalide or by reaction of an .alpha.-bromoacetophenone with an N,N'-dibenzyl-polymethylenediamine, with further operations depending on the nature of the 3-substituent, and subsequently hydrogenating catalytically with for example palladium-on-carbon. The key intermediates are also part of the invention.
N,N'-双[2-(3-取代-
4-羟基苯基)-乙基或-2-羟基乙基]-聚甲基二胺具有β-
肾上腺素刺激活性,特别作为选择性支气管扩张剂。通常通过N-苄基苯
乙胺与聚甲烯二卤化物的缩合或α-
溴代
苯乙酮与N,N'-双苄基-聚甲基二胺的反应制备,随后根据3-取代基的性质进行进一步操作,最后进行例如
钯-碳上的催化氢化。关键中间体也是该发明的一部分。