title: Synthesis and pharmacological evaluation of cyclic and opened thioanalogues of piperoxan.
abstract: Three piperoxan analogues, derived from the opening of the benzodioxane ring and/or replacement of the oxygen atom with the less polar sulfur, were synthesized. The decrease of the alpha-blocking activity found for these compounds showed that the binding site of benzodioxane-like compounds does not accept the substitution with less polar groups.
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000138:chemical synthesis*; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004558:Electric Stimulation; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D010880:Piperidines / Q000494:pharmacology*; D010883:Piperoxan / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000494:pharmacology*; D051381:Rats; D011942:Receptors, Adrenergic, alpha / Q000187:drug effects; D013329:Structure-Activity Relationship; D013569:Synapses / Q000187:drug effects
chemical_list: D000317:Adrenergic alpha-Antagonists; D010880:Piperidines; D011942:Receptors, Adrenergic, alpha; D010883:Piperoxan