1-(1,2,5-Thiadiazol-4-yl)-4-azatricyclo[2.2.1.0<sup>2,6</sup>]heptanes as New Potent Muscarinic M<sub>1</sub> Agonists: Structure−Activity Relationship for 3-Aryl-2-propyn-1-yloxy and 3-Aryl-2-propyn-1-ylthio Derivatives
作者:Lone Jeppesen、Preben H. Olesen、Lena Hansen、Malcolm J. Sheardown、Christian Thomsen、Thøger Rasmussen、Anders Fink Jensen、Michael S. Christensen、Karin Rimvall、John S. Ward、Celia Whitesitt、David O. Calligaro、Frank P. Bymaster、Neil W. Delapp、Christian C. Felder、Harlan E. Shannon、Per Sauerberg
DOI:10.1021/jm9910019
日期:1999.6.1
Two new series of 1-(1,2,5-thiadiazol-4-yl)-4-azatricyclo[2.2.1.0(2,6)]heptanes were synthesized and evaluated for their in vitro activity in cell lines transfected with either the human M-1 or M-2 receptor. 3-Phenyl-2-propyn-1-yloxy and -1-ylthio analogues substituted with halogen in the meta position showed high functional potency, efficacy, and selectivity toward the M-1 receptor subtype. A quite unique functional M-1 receptor selectivity was observed for compounds 8b, 8d, 8f, 9b, 9d, and 9f. Bioavailability studies in rats indicated an oral bioavailability of about 20-30%, with the N-oxide as the only detected metabolite.