Tocolytic oxytocin receptor antagonists

Abstract

Compounds of the formula X--Y--R, or the pharmaceutically acceptable salts and esters thereof, wherein X is ##STR1## Y is --SO.sub.2 --, --(CH.sub.2).sub.p -- or --CO--(CH.sub.2).sub.p --; R is unsubstituted or substituted phenyl where said substitutents are one or more of R.sup.5, R.sup.6 or R.sup.7 ; R.sup.1 is hydrogen, cyano, phenyl,--CONHR.sup.2, --CONR.sup.2 R.sup.2, --(CH.sub.2).sub.m --OR.sup.2, --(CH.sub.2).sub.p --S(O).sub.r --R.sup.2, --(CH.sub.2).sub.m --CO.sub.2 R.sup.2, --(CH.sub.2).sub.m --N.sub.3, --(CH.sub.2).sub.m --NH.sub.2 or --(CH.sub.2).sub.m --NR.sup.2 R.sup.2 ; R.sup.2 is hydrogen, C.sub.3-8 cycloalkyl or C.sub.1-5 alkyl; R.sup.5 and R.sup.6 are each independently selected from hydrogen, C.sub.1-5 alkoxy, halogen or --(CH.sub.2).sub.n --N(R.sup.2)--C(O)--R.sup.18 ; R.sup.7 is hydrogen or ##STR2## R.sup.11 is selected from hydrogen, C.sub.1-5 alkylcarbonyl, ##STR3## or substituted C.sub.1-5 alkyl wherein said alkyl substituent is unsubstituted, mono-, di- or tri-substituted pyridyl wherein said substitutents on said pyridyl are independently selected from halogen, C.sub.1-5 alkyl or C.sub.1-5 alkoxyl; R.sup.13 is unsubstituted or substituted C.sub.1-10 alkyl wherein the substituent is selected from --N(R.sup.2).sub.2, --NHR.sup.2 or imidazolyl; R.sup.14 and R.sup.15 are each independently selected from C.sub.1-5 alkyl, C.sub.1-5 alkoxy or halogen; R.sup.16 is hydrogen or oxo; R.sup.18 is C.sub.1-5 alkoxyl, unsubstituted or substituted C.sub.1-5 alkyl where said substituent is Het, unsubstituted or substituted C.sub.2-5 alkenyl where said subsituent is Het or Het; Het is benzimidazolyl, carboxymethyl-substituted benzimidazolyl or indolyl; m is an integer of from 1 to 5; p is an integer of from 1 to 3; and r is an integer of from 0 to 2. Such compounds as useful as oxytocin and vasopressin receptor antagonists.