title: Synthesis and antagonistic activity at muscarinic receptor subtypes of some derivatives of diphenidol.
abstract: A series of new derivatives, related to diphenidol and to its 2-carbonyl analogue, were designed as antimuscarinic agents. The synthesized compounds were evaluated both as hydrochlorides and as methiodides by functional tests at guinea-pig heart (M(2)), guinea-pig ileum (M(3)) and rabbit vas deferens (putative M(4)). Two derivatives (3a and 5a) showed an M(3)-selective profile similar to that of the reference compounds, though they resulted less potent.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects / Q000502:physiology; D007082:Ileum / Q000187:drug effects / Q000502:physiology; D066298:In Vitro Techniques; D008297:Male; D018727:Muscarinic Antagonists / Q000138:chemical synthesis* / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology; D010880:Piperidines / Q000138:chemical synthesis* / Q000494:pharmacology*; D043585:Receptor, Muscarinic M2 / Q000037:antagonists & inhibitors; D043587:Receptor, Muscarinic M3 / Q000037:antagonists & inhibitors; D043588:Receptor, Muscarinic M4 / Q000037:antagonists & inhibitors; D013329:Structure-Activity Relationship; D014649:Vas Deferens / Q000187:drug effects / Q000502:physiology
chemical_list: D018727:Muscarinic Antagonists; D010880:Piperidines; D043585:Receptor, Muscarinic M2; D043587:Receptor, Muscarinic M3; D043588:Receptor, Muscarinic M4; C004858:diphenidol