NOVEL 4H-TRIAZOLO (4, 3-A)(1, 4) BENZODIAZEPINES, PRODUCTIONTHEREOF, USE THEREOF AS DRUG AND COMPOSITION CONTAINING THE SAME

1. Claims for the contracting States CH, DE, GB, IT, LI, NL The compounds of formula (I) : see diagramm : EP0227539,P11,F1 in which R1 and R2 represent a hydrogen atom or an alkyl radical containing from 1 to 5 carbon atoms, R3 , R4 , R5 , R6 , identical or different, in any position on the benzene nuclei, represent a hydrogen atom, a hydroxyl radical, an alkyl radical containing from 1 to 4 carbon atoms, an Oalk1 radical, alk1 representing an alkyl radical containing from 1 to 4 carbon atoms, an NH2 , NHalk2 radical, alk2 representing an alkyl radical containing from 1 to 4 carbon atoms, an see diagramm : EP0227539,P11,F2 radical, alk3 and alk'3 , identical or different representing an alkyl radical containing from 1 to 4 carbon atoms, a halogen atom, a CF3 or an NO2 radical, on the condition that R5 and R6 does not represent at the same time a hydrogen atom, in all the racemic or optically active forms, as well as their addition salts with acids. 1. Claims for the contracting State ES Preparation process for compounds of formula (I) : see diagramm : EP0227539,P12,F2 in which R1 and R2 represent a hydrogen atom or an alkyl radical containing from 1 to 5 carbon atoms, R3 , R4 , R5 , R6 , identical or different, in any position on the benzene nuclei, represent a hydrogen atom, a hydroxyl radical, an alkyl radical containing from 1 to 4 carbon atoms, an Oalk1 radical, alk1 representing an alkyl radical containing from 1 to 4 carbon atoms, an NH2 , NHalk2 radical, alk2 representing an alkyl radical containing from 1 to 4 carbon atoms, see diagramm : EP0227539,P12,F3 radical, alk3 and alk'3 , identical or different, representing an alkyl radical containing from 1 to 4 carbon atoms, a halogen atom, a CF3 radical or an NO2 radical, on the condition that R5 and R6 do not represent at the same time a hydrogen atom, in all racemic or optically active forms, as well as their addition salts with acids, characterised in that a compound of formula II : see diagramm : EP0227539,P13,F1 in which R1 , R2 , R3 and R4 have the previous meanings, in the racemic or optically active form, is subjected to the action of a compound of formula (III) : see diagramm : EP0227539,P13,F2 in which R5 and R6 have the previous meanings, so as to obtain a compound of formula (I) in the racemic or optically active form, which is converted, if desired, into salts by the action of an acid.