DIAZEPINE DERIVATIVES

This invention relates to a process for the preparation of imidazo1,5-a!1,4!diazepine compounds of the general formula I' wherein A represents -C(R6)=N-; R1 represents hydrogen, lower alkyl, hydroxy lower alkyl, lower alkanoyloxy lower alkyl, phenyl, halo lower alkyl, amino lower alkyl, mono- or di-lower alkylamino lower alkyl, pyridyl, phenyl lower alkyl or the group -CHO; R2" represents hydrogen, lower alkyl, chloro, bromo, iodo, hydroxy lower alkyl, lower alkanoyloxy lower alkyl, lower alkoxy lower alkyl, halo lower alkyl, amino lower alkyl, cyano, cyano lower alkyl, lower alkanoylamino lower alkoxycarbonylamino, phenyl lower alkoxycarbonylamino, mono- or di-lower alkyl amino lower alkyl, the group -COOR10 (wherein R10 represents hydrogen or lower alkyl), the group -COR10 (wherein R10 represents hydrogen or lower alkyl) or a derivative thereof selected from (a) the group -C(R10)=N-R11 wherein R11 represents hydroxy, lower alkoxy or di-lower alkylamino and R10 represents hydrogen or lower alkyl; (b) the group -CONR12R13, wherein R12 represents hydrogen, lower alkyl, phenyl lower alkyl or the group -(CH2)nNR14R15 (wherein R14 and R15 represent lower alkyl, and n is 1 to 4) and R13 represents hydrogen, lower alkyl or phenyl lower alkyl, or R12 and R13 together form pyrrolidino or (c) the group -CON(R16)NR17- R18, wherein R16, R17 and R18 represent hydrogen or lower alkyl; R3 represents hydrogen or lower alkyl; R6 represents phenyl, halophenyl or pyridyl and represents the group (a) (b) (d) wherein X is chlorine, bromine or iodine, T and T' independently are lower alkyl, R4 represents halogen, nitro or cyano, and R5 represents hydrogen analogs thereof corresponding to formula I' but, wherein A represents the group (f) (g) represents the group (a) above, R5 is hydrogen, and R1, R2", R3 and R6 are as in formula I' above, and to the compounds thus obtained being useful as muscle relaxants, sedatives and anticonvulsants. This invention relates to a process for the preparation of imidazo¢1,5-a!¢1,4!diazepine compounds of the general formula I' wherein A represents -C(R6)=N-; R1 represents hydrogen, lower alkyl, hydroxy lower alkyl, lower alkanoyloxy lower alkyl, phenyl, halo lower alkyl, amino lower alkyl, mono- or di-lower alkylamino lower alkyl, pyridyl, phenyl lower alkyl or the group -CHO; R2" represents hydrogen, lower alkyl, chloro, bromo, iodo, hydroxy lower alkyl, lower alkanoyloxy lower alkyl, lower alkoxy lower alkyl, halo lower alkyl, amino lower alky