Merck + Co., Inc.

Michelle A Sparks

Roger M Freidinger

Peter D Williams

Ian M Bell

Debra S Perlow

James P Guare

Kenneth J Stauffer

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.

Tocolytic oxytocin receptor antagonists

This invention relates to certain novel piperazine 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.

Piperazine oxytocin receptor antagonists

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. 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. A typical compound is as follows: ##STR1##

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Gwynedd Valley, PA, United States of America

Michelle A Sparks