Identification and Initial Structure−Activity Relationships of (<i>R</i>)-5-(2-Azetidinylmethoxy)-2-chloropyridine (ABT-594), a Potent, Orally Active, Non-Opiate Analgesic Agent Acting via Neuronal Nicotinic Acetylcholine Receptors
作者:Mark W. Holladay、James T. Wasicak、Nan-Horng Lin、Yun He、Keith B. Ryther、Anthony W. Bannon、Michael J. Buckley、David J. B. Kim、Michael W. Decker、David J. Anderson、Jeffrey E. Campbell、Theresa A. Kuntzweiler、Diana L. Donnelly-Roberts、Marietta Piattoni-Kaplan、Clark A. Briggs、Michael Williams、Stephen P. Arneric
DOI:10.1021/jm9706224
日期:1998.2.1
New members of a previously reported series of 3-pyridyl ether compounds are disclosed as novel, potent analgesic agents acting through neuronal nicotinic acetylcholine receptors. Both (R)-2-chloro-5-(2-azetidinylmethoxy)pyridine (ABT-594, 5) and its S-enantiomer (4) show potent analgesic activity in the mouse hot-plate assay following either intraperitoneal (ip) or oral (po) administration, as well as activity in the mouse abdominal constriction (writhing) assay, a model of persistent pain. Compared to the S-enantiomer and to the prototypical potent nicotinic analgesic agent (+/-)-epibatidine, 5 shows diminished activity in models of peripheral side effects. Structure-activity studies of analogues related to 4 and 5 suggest that the N-unsubstituted azetidine moiety and the 2-chloro substituent on the pyridine ring are important contributors to potent analgesic activity.