4(2-indolyl)2-amino-pentanedioic acids and cholecyostokinin use thereof

Abstract

All possible isomeric forms and mixtures thereof of compounds of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of indolyl, pyridyl, piperidinyl, quinolyl, thiazolyl and aryl of 6 to 14 carbon atoms and aralkyl of 7 to 18 carbon atoms with the latter two being unsubstituted or substituted with at least one member of the group consisting of halogen, alkyl and alkoxy of 1 to 8 carbon atoms, dialkylamino with alkyls of 1 to 8 carbon atoms, --CF.sub.3, --CN and --NO.sub.2, R.sub.2 is selected from the group consisting of ##STR2## Ar' are selected from the group consisting of pyridyl, indolyl, thiazolyl and aryl of 6 to 14 carbon atoms with the latter and the phenyl ring of b) being substituted or substrituted with at least one member of the group consisting of halogen, alkyl and alkoxy of 1 to 8 carbon atoms, dialkylamino with alkyls of 1 to 8 carbon atoms, --CF.sub.3, --CN and --NO.sub.2 and R.sub.3 is hydrogen or R.sub.2 and R.sub.3 together with the nitrogen to which they are attached form a 5 to 7 member hydrocarbyl ring optionally containing an oxygen or a second nitrogen unsubstituted or substituted with at least one member of the group consisting of alkyl of 1 to 8 carbon atoms, aryl of 6 to 14 carbon atoms and ##STR3## Ar and Ar' having the above definitions and R.sub.4 is selected from the group consisting of hydrogen, alkyl of 1 to 8 carbon atoms, cycloalkyl of 3 to 8 carbon atoms, ##STR4## and aralkyl of 7 18 carbon atoms unsubstituted or substituted with at least one member of the group consisting of halogen, alkyl and alkoxy of 1 to 8 carbon atoms, dialkylamino with alkyls of 1 to 8 carbon atoms, --CF.sub.3, --CN and --NO.sub.2, Alk.sub.1 is an alkylene of 2 to 8 carbon atoms and alk.sub.2 and Alk.sub.3 are individually alkyl of 1 to 8 carbon atoms or cycloalkyl of 3 to 8 carbon atoms having cholecystokinin agonistic or antagonistic activity.