摘要:
Bioisosteric replacement of the isoxazole heterocycle in (3-methyl-5-isoxazolyl)methylene-azacyclic compounds with pyridine, oxadiazole, or an acyl group resulted in ligands with high to moderate affinity for the central nicotinic cholinergic receptors (IC50 = 2.0 to IC50 > 1000 nM) labeled by [H-3]methylcarbamylcholine. Additionally, further support of an important distance parameter for high-affinity nicotinic compounds has been provided. (C) 2000 Elsevier Science Ltd. All rights reserved.