Synthesis and .beta.-adrenergic blocking activity of new aliphatic oxime ethers

Abstract
New .beta.-adrenergic blocking agents, most of which do not contain an aromatic nucleus, were synthesized. They were derived from alkylamino-aliphatic oxime ethers or alkylamino-aliphatic ethers. Most active among these are O-[3-(tert-butylamino)-2-hydroxypropyl]acetoxime (8; trachea pA2 [effective concentration of agonist to antagonist] = 7.65) and 1-isobutoxy-3-(tert-butylamino)-2-propanol (15; trachea pA2 = 7.49), both of which displayed bronchoselectivity (.beta.2/.beta.1 ratio .apprx. 15) in guinea pigs. The role and importance of the aromatic nucleus in this class of compounds are discussed.

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