Halogen substituted .alpha.-(aminoalkyl)-3,4-dihydroxybenzyl alcohols having .beta.-adrenergic stimulant activity, particularly as selective bronchodilators. The .alpha.-aminomethyl derivatives are prepared by the condensation of an appropriately substituted styrene oxide with a primary amine followed by removal of the ether protective group(s). The .alpha.-aminoethyl or .alpha.-aminopropyl derivatives are prepared by the condensation of an appropriately substituted .alpha.-bromoalkyl phenyl ketone with an N-benzyl secondary amine followed by reduction of the ketone moiety and removal of the ether protective group(s).