Abstract: New 3,5-disubstituted-1H-1,2,4-triazoles of formula ##STR1## wherein: R is selected from hydrogen, (C.sub.1-4)alkyl, (C.sub.1-4)alkoxy, allyloxy, propargyloxy, trifluoromethyl, phenyl, fluoro, chloro and dimethylamino;R.sub.1 represents a (C.sub.1-4)alkyl group;R.sub.2 is selected from hydrogen, fluoro, chloro, (C.sub.1-4)alkyl, methoxy and ethoxy;R.sub.3 is selected from hydrogen, fluoro, chloro, (C.sub.1-4)alkyl and (C.sub.1-4)alkoxy;R and R.sub.3 taken together represent a methylenedioxy group; with the proviso that, when simultaneously R, R.sub.2 and R.sub.3 represent hydrogen,cannot be methyl;with the further proviso that, when simultaneously R.sub.2 and one of R and R.sub.3 represent hydrogen, R.sub.1 and the other of R and R.sub.3 cannot simultaneously represent methyl;and salts therewith of pharmaceutically acceptable acids.The compounds possess anti-reproductive utility.

Abstract: A new process for preparing s-triazolo[5,1-a]-isoquinoline derivatives of the formula ##STR1## wherein A represents the group --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--; R is selected from hydrogen, amino, lower alkylamino, di-lower alkylamino, acylamino, diacylamino, ureido, thioureido, carbethoxythioureido, benzoylthioureido, sulfhydryl, lower alkyl, trifluoromethyl, phenyl, substituted phenyl, pyridyl, methylpyridyl and dimethylpyridyl; and R.sub.1 and R.sub.2 each independently represents hydrogen or lower alkoxy; by condensation of a 2-amino-3,4-dihydro-1(2H)-isoquinolinone with an imidolyl, cyanamide, cyanic or thiocyanic derivative.New compounds of the formula I wherein A represents the group --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--, R has the same meaning as above with the exclusion of hydrogen, methyl, phenyl, and trifluoromethyl, R.sub.1 and R.sub.2 have the same meaning as above, with the proviso that when A represents the group --CH.dbd.CH--, R cannot be tolyl or pyridyl.

Abstract: A new process for preparing s-triazolo[5,1-a]-isoquinoline derivatives of the formula ##STR1## wherein A represents the group --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--; R is selected from hydrogen, amino, lower alkylamino, di-lower alkylamino, acylamino, diacylamino, ureido, thioureido, carbethoxythioureido, benzoylthioureido, sulfhydryl, lower alkyl, trifluoromethyl, phenyl, substituted phenyl, pyridyl, methylpyridyl and dimethylpyridyl; and R.sub.1 and R.sub.2 each independently represents hydrogen or lower alkoxy, by condensation of a 2-amino-3,4-dihydro-1(2H)-isoquinolinone with an imidolyl, cyanamide, cyanic or thiocyanic derivative.New compounds of the formula I wherein A represents the group --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--, R has the same meaning as above with the exclusion of hydrogen, methyl, phenyl, and trifluoromethyl, R.sub.1 and R.sub.2 have the same meaning as above, with the proviso that when A represents the group --CH.dbd.CH--, R cannot be tolyl or pyridyl.