Abstract: A 3,5-dioxo-(2H,4H)-1,2,4-triazine compounds of formula I ##STR1## in which: R.sub.1 and R.sub.2, which are identical or different, represent hydrogen or C.sub.1 -C.sub.6 alkyl, n is 2 to 6, inclusive,A represents aryl piperazino II ##STR2## the Ar grouping representing phenyl, naphthyl, pyrimidyl, or pyridyl, unsubstituted or substituted by C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, hydroxy, trifluoromethyl, or halogen, or III benzodioxanyl-methyl-amino or pyridodioxanyl-methyl-amino ##STR3## in which R represents hydrogen or C.sub.1 -C.sub.3 alkyl and X represents a nitrogen or carbon atom, therapeutically-acceptable salts and enantiomers thereof, pharmaceutical compositions thereof, and method for treatment of diseases requiring a 5HT.sub.1A receptor agonist therewith.

Abstract: New derivatives of 1,2-dihydro 2-oxo quinoxalines corresponding to the general formula I: ##STR1## in which: R is a hydrogen or halogen atomR.sub.1 is a hydrogen atom or a straight or branched C.sub.1 -C.sub.4 alkyl radicalR.sub.2 is:a hydrogen atoma C(O)R.sub.4 radical in which R.sub.4 is a straight or branched C.sub.1 -C.sub.4 alkyl groupa C(O)NHR.sub.5 radical in which R.sub.5 is a straight or branched C.sub.1 -C.sub.4 alkyl radical or a phenyl groupA is a C.sub.1 -C.sub.4 alkaline chainR.sub.3 represents:a hydrogen atom, a C.sub.1 -C.sub.4 alkyl radical, a C.sub.3 -C.sub.6 cycloalkyl radical, an alcynyl, nitrile, hydroxyl, carboxamido, pyridyl, phenyl group, or a phenyl group substituted by a halogen atom, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a nitro groupan alkenyl radical of the formula: ##STR2## in which R.sub.6, R.sub.7 may, independently of each other, be a hydrogen atom, a C.sub.1 -C.sub.