Novel 4H-1,2,4-triazole derivatives

Abstract

Compounds selected from the group consisting of 4H-1,2,4-triazoles of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be in different positions of the benzene ring, R.sub.1, R.sub.3 and R.sub.4 are individually selected from the group consisting of hydrogen, --OH, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen, --CH.sub.3, --NO.sub.2, --NH.sub.2 and NH--AlK and ##STR2## R.sub.2 is selected from the group consisting of hydrogen, --OH, alkyl of 1 to 4 carbon atoms, halogen, --CF.sub.3, --NO.sub.2, --NH.sub.2, --NH--AlK and ##STR3## and AlK, AlK.sub.1 and AlK.sub.2 are alkyl of 1 to 4 carbon atoms or R.sub.1 and R.sub.2 together and/or R.sub.3 and R.sub.4 together are methylenedioxy, R is selected from the group consisting of ethyl, --CH.sub.2 --COOH and CH.sub.2 --COOAlK.sub.3 and AlK.sub.3 is alkyl of 1 to 4 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts, with the proviso that R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are not all hydrogen having a remarkable analgesic activity and a novel method for their preparation.

Dependencies are inferred from the claim text.