2-Fluoro-, 4-fluoro-, and 6-fluorophenylephrine (6-FPE) were synthesized from the corresponding fluorinated 3-hydroxybenzaldehydes. New routes to 2-fluoro-and 6-fluoro-3- hydroxybenzaldehydes were developed based on regioselective lithiation of 2-and 4- [(dimethyl-tert-butylsilyl) oxy] fluorobenzene ortho to fluorine. As with norepinephrine and isoproterenol analogues, the adrenergic properties of phenylephrine were markedly ...