Phenethanolamine derivatives are disclosed of formula ##STR1## wherein m is 2 to 8; n is 1 to 7 provided that m+n is 4 to 12; Ar is phenyl or phenyl substituted by one or two halogen atoms, alkyl or alkoxy groups or by an alkylenedioxy group; R.sup.1 and R.sup.2 are hydrogen or alkyl provided that the sum total of carbon atoms in R.sup.1 and R.sup.2 is not more than 4; and the physiologically acceptable salts and solvates thereof. The compounds have a selective stimulant action at .beta..sub.2 -adrenoreceptors and may be used inter alia in the treatment of diseases associated with reversible airways obstructions such as asthma and chronic bronchitis. The compounds may be formulated in conventional manner as pharmaceutical compositions with physiologically acceptable carriers or excipients. The compounds may be prepared, for example by alkylation of an amine: ##STR2## where R.sup.3, R.sup.5 and R.sup.6 is hydrogen or a protecting group, followed by removal of any protecting group.
本文披露了公式为##STR1##的
苯乙醇胺衍
生物,其中m为2至8; n为1至7,但m+n为4至12; Ar为苯基或被一个或两个卤素原子、烷基或烷氧基或烷二氧基基团取代的苯基; R.sup.1和R.sup.2为氢或烷基,但R.sup.1和R.sup.2中碳原子的总数不超过4;以及其生理上可接受的盐和溶剂化物。这些化合物在β2-
肾上腺素受体上具有选择性的兴奋作用,可用于治疗与可逆性气道阻塞相关的疾病,如哮喘和慢性支气管炎等。这些化合物可以与生理上可接受的载体或赋形剂一起制成常规的药物组成物。这些化合物可以通过烷基化胺的方法制备,例如:##STR2##其中R.sup.3、R.sup.5和R.sup.6为氢或保护基,随后去除任何保护基。