Rigidified acetylcholine mimics: conformational requirements for binding to neuronal nicotinic receptors
作者:Gérald Villeneuve、Danielle Cécyre、Hélène Lejeune、Marc Drouin、Ruoxi Lan、Rémi Quirion
DOI:10.1016/s0960-894x(03)00728-5
日期:2003.11
Rigidified derivatives have been designed and synthesized assuming the g + t conformer of acetylcholine (N-C-C-O = + 60degrees, C-C-O-C = 180degrees) as active conformation for binding to cytisine sensitive neuronal nicotinic receptors. The SAR of the compounds evaluated, along with those of more flexible analogues, support the g + t conformer hypothesis and highlight the stringent steric limitation of this nicotinic receptor sub-type. Compound 3e has low muM affinity for cytisine sensitive nicotinic receptor binding sites while being selective with regard to the a-bungarotoxin sensitive subclass. We also report few compounds with muM affinity for the a-bungarotoxin sensitive subclass. (C) 2003 Elsevier Ltd. All rights reserved.