1036765-93-1Relevant articles and documents
Diphenidol-related diamines as novel muscarinic M4 receptor antagonists
Varoli, Lucilla,Andreani, Aldo,Burnelli, Silvia,Granaiola, Massimiliano,Leoni, Alberto,Locatelli, Alessandra,Morigi, Rita,Rambaldi, Mirella,Bedini, Andrea,Fazio, Nicola,Spampinato, Santi
, p. 2972 - 2976 (2008/12/23)
A series of hydrochloride derivatives 2a-9a and quaternary ammonium derivatives 3b-9b of diphenidol have been synthesized and characterized in receptor binding and cellular functional assays versus human muscarinic M1-M5 receptors expressed in CHO cells. Compound 8b, a methiodide derivative with a bipiperidinyl moiety and a second diphenidol framework, showed a potent and selective M4 activity as competitive antagonist. Moreover 8b, acting as an allosteric modulator, was able to retard the dissociation rate of [3H]-N-methylscopolamine from CHO-M4 cell membranes exposed to atropine. Taken together, these data suggest that 8b might open new avenues to the discovery of novel multivalent antagonists for the muscarinic receptors.