A series of β-chloroethylamines 5–18, structurally related to the irreversible α1-adrenoceptor antagonist phenoxybenzamine [PB, N-benzyl-N-(2-chloroethyl)-N-(1-methyl-2- phenoxyethyl) amine hydrochloride, 1] and the competitive antagonist WB4101 [N-(2, 3- dihydro-1, 4-benzodioxin-2-ylmethyl)-N-[2-(2, 6-dimethoxyphenoxy) ethyl] amine hydrochloride, 2], were synthesized and evaluated for their activity at α-adrenoceptors of ...