Identification and Initial Structure−Activity Relationships of (R)-5-(2-Azetidinylmethoxy)-2-chloropyridine (ABT-594), a Potent, Orally Active, Non-Opiate Analgesic Agent Acting via Neuronal Nicotinic Acetylcholine Receptors
摘要:
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.
Efficient asymmetric synthesis of ABT-594; a potent, orally effective analgesic
作者:John K. Lynch、Mark W. Holladay、Keith B. Ryther、Hao Bai、Chi-Nung Hsiao、Howard E. Morton、Daniel A. Dickman、William Arnold、Steven A. King
DOI:10.1016/s0957-4166(98)00291-2
日期:1998.8
A concise asymmetricsynthesis of (R)-2-chloro-5-(2-azetidinylmethoxy)pyridine (ABT-594) is presented in which the keyintermediate t-butoxycarbonyl protected (2R)-azetidinylalcohol is obtained in three steps from the dibenzyl ester of D-aspartic acid in 44% yield and >99% ee.