Abstract Purpose. Many biogenic amines where an aromatic proton is substituted with fluorine have exhibited pharmacological properties that are dependent on the position of fluorine on the aromatic ring. For example, 6-fluoroepinephrine is selective for α-adrenergic receptors whereas the 2-fluoroisomer is selective for β-receptors. Aryloxypropanolamines are β-receptor agonists or antagonists, depending on the aryl group and its substituents. ...
