Phenolethanolamines, their use as pharmaceuticals and as growth enhancers for animals and processes for their preparation

Abstract From the Canadian patent

1, Abstract, Phenylethanolamines, The invention relates to new phenylethanolamines of formula I, (I), wherein, A represents a straight-chained or branched alkylene group, B represents a bond or an alkylene carbonyl or, hydroxymethylene group, R1 represents a hydrogen or halogen atom or a trifluoromethyl group, R2 represents a hydrogen atom or an amino group R3 represents a cyano group or a hydrogen chlorine, or bromine atom and, R4 represents a hydrogen or halogen atom or an alkyl, hydroxy, carboxy, alkoxycarbonyl aminocarbonyl, alkylaminocarbonyl or dialkylaminocarbonyl group or an alkoxy group optionally substituted in the end position by a carboxy, alkoxycarbonyl aminocarbonyl, …