Imidazodiazepines and processes therefor

A compound of the formula ##STR86## wherein A is ##STR87## R.sub.1 is selected from the group consisting of hydrogen, lower alkyl, hydroxy lower alkyl, acyloxy lower alkyl, phenyl, alkoxy lower alkyl, halo lower alkyl, amino lower alkyl, tolyl substituted amino lower alkyl, substitued phenyl, pyridyl, aralkyl and the group ##STR88## wherein R is hydrogen or lower alkyl and ROOC where R is lower alkyl;

• R.sub.2 is selected from the group consisting of hydrogen, lower alkyl, hydroxy lower alkyl, acyloxy lower alkyl, alkoxy lower alkyl, halo lower alkyl, cyano, cyano lower alkyl, substituted amino lower alkyl, amino lower alkyl, substituted amino, the group COOR where R is hydrogen or lower alkyl, the group ##STR89## where R is hydrogen or lower alkyl, or derivatives thereof, i.e., the group R-C=N-R' wherein R' is hydrogen, lower alkyl, hydroxy, phenyl, alkoxy, amino, mono or dialkylamino and arylamino and R is hydrogen or lower alkyl, the group ##STR90## (where R, R' are hydrogen, lower alkyl, aryl, hydroxy lower alkyl, lower alkenyl, or together R and R' with the nitrogen atom may form a part of a 5 or 6 membered heterocyclic ring and the group (CH.sub.2).sub.n NRR' where R and R' are hydrogen, lower alkyl, hydroxy lower alkyl, lower alkenyl, aryl or together R and R' with the nitrogen may form a part of a 5 or 6 membered heterocyclic ring), the group ##STR91## where R.sup.10, R.sup.11, R.sup.12 are hydrogen or lower alkyl and the group (CH.sub.2).sub.n NR.sup.13 R.sup.14 where n is 1 to 4 and R.sup.13, R.sup.14 are hydrogen or lower alkyl;
• R.sub.3 is selected from the group consisting of hydrogen or lower alkyl;
• R.sub.5 is selected from the group consisting of hydrogen, lower alkanoyloxy and hydroxy;
• R.sub.4 is selected from the group consisting of hydrogen, halogen, nitro, cyano, trifluoromethyl, lower alkyl, substituted amino, amino, hydroxy lower alkyl and lower alkanoyl;
• R.sub.6 is selected from the group consisting of phenyl, mono-substituted phenyl, disubstituted phenyl, pyridyl and mono-substituted pyridyl
• and the pharmaceutically acceptable salts thereof.