FREMGANGSMAADE TIL FREMSTILLING AF BENZODIAZEPINDERIVATER OG SALTE DERAF

Compounds are described of the formula or an acid addition salt thereof; in which R1, R2, R3 and R4 independently represent hydrogen, C1-4 alkyl, C2-4 alkenyl, C3-7 cycloalkyl, C3-7 cycloalkyl C1-4 alkyl, halogen, C1-4 haloalkyl, C1-4 alkanoyl, nitro, amino, C2-4 acylamino, cyano, hydroxyl, C1-4 alkoxy, C1-4 alkylthio, C1-4 haloalkoxy or a group of the formula -SO2N(R8)2, -SO2R8 or -SO3R8 where R8 is C1-4 alkyl, C1-4 haloalkyl or optionally substituted phenyl; in which R5 is a group of the formula where R9 is hydrogen, C1-4 alkyl, C3-7 cycloalkyl, C3-7 cycloalkyl C1-4 alkyl, C1-4 haloalkyl, C2-4 alkenyl, C1-4 alkanoyl, benzyl, cyano or optionally substituted phenyl, where R10 is hydrogen, C1-4 alkyl or optionally substituted phenyl and where n is 0 or 1; in which R6 is hydrogen, C1-10 alkyl, C3-7 cycloalkyl, C3-7 cycloalkyl C1-4 alkyl, C1-4 haloalkyl, benzyl, C1-6 alkanoyl, C1-4 carbalkoxy or benzoyl; and in which R7 is one of the values of R6 or halogen, nitro, cyano, amino or C1-4 acylamino. The compounds are active as pharmaceuticals and particularly in the treatment of disorders of the central nervous system. Intermediate compounds in which R5 is thiol, hydroxy, or amino are also described.