Substituted pyrido (2,3-b)(1,4)benzodiazepin-6-ones, processes for theirpreparation and medicaments containing these compounds

Abstract From the Canadian patent

Substituted pyrido2,3-b1,4benzodiazepin- 6-ones, The invention relates to a new compound of formula I, (I), (wherein, R1 represents a C1-4 alkyl group or a chlorine, or hydrogen atom;, R2 represents a hydrogen atom or a methyl group; R3 and R4 each represent a hydrogen, fluorine chlorine or bromine atom, or a C1-4 alkyl group with the proviso that at least one of the radicals R1, R2, R3 and R4 is other than hydrogen; R5 and R6, which are the same or different each, represents a C1-6 alkyl group, or R5 and R6 together, with the nitrogen atom between them represent, a 4- to 7-membered saturated monocyclic, heteroaliphatic, ring optionally incorporating within the ring an oxygen atom or an …