Roussel Uclaf

John R Hedgecock

Colin R Gardner

A compound selected from the group consisting a compound of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of phenyl, cycloalkyl of 4 to 6 carbon atoms and ##STR2## R.sub.4 and R.sub.5 are individually hydrogen or alkyl of 1 to 5 carbon atoms, R.sub.6 is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, phenyl, halogen, alkoxycarbonyl of 2 to 5 carbon atoms, cyano, amido and mono- and dialkylamido of 1 to 5 alkyl carbon atoms, R.sub.2 and R.sub.3 are individually selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms and cycloalkyl of 3 to 5 carbon atoms or taken together form alkylene of 3 to 5 carbon atoms, X and Y are individually selected form the group consisting of hydrogen, halogen, --NO.sub.2, azido, --CN, --CF.sub.3 and alkyl and alkoxy of 1 to 3 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts capable of inducing an affinity for benzodiazepine receptors and a novel process and novel intermediates for their preparation.

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Bassett, United Kingdom

John R Hedgecock