This invention relates to certain novel benzoxazinone compounds and derivatives thereof, their synthesis, and their use as oxytocin receptor antagonists. One application of these compounds is in the treatment of preterm labor in mammals, especially humans. The ability of the compounds to relax uterine contractions in mammals also makes them useful for treating dysmenorrhea and stopping labor prior to cesarean delivery.
Development of Orally Active Oxytocin Antagonists: Studies on 1-(1-{4-[1-(2-Methyl-1-oxidopyridin-3-ylmethyl)piperidin-4-yloxy]-2- methoxybenzoyl}piperidin-4-yl)-1,4-dihydrobenz[<i>d</i>][1,3]oxazin-2-one (L-372,662) and Related Pyridines
作者:Ian M. Bell、Jill M. Erb、Roger M. Freidinger、Steven N. Gallicchio、James P. Guare、Maribeth T. Guidotti、Rita A. Halpin、Doug W. Hobbs、Carl F. Homnick、Michelle S. Kuo、Edward V. Lis、David J. Mathre、Stuart R. Michelson、Joseph M. Pawluczyk、Douglas J. Pettibone、Duane R. Reiss、Stanley Vickers、Peter D. Williams、Carla J. Woyden
DOI:10.1021/jm9800797
日期:1998.6.1
The previously reported oxytocinantagonist L-371,257 (2) has been modified at its acetylpiperidine terminus to incorporate various pyridine N-oxide groups. This modification has led to the identification of compounds with improved pharmacokinetics and excellent oral bioavailability. The pyridine N-oxide series is exemplified by L-372,662 (30), which possessed good potency in vitro (Ki = 4.1 nM, cloned