Anti-ulcer and anti-hypersecretion dibenzoimidazothiazepine derivatives,

Abstract

This invention relates to compounds of formula ##STR1## or a pharmaceutically acceptable salt thereof wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 independently represent hydrogen or a substituent selected from lower alkyl, lower alkoxy, halogen, alkanoyl of 2 to 7 carbon atoms, lower alkoxycarbonyl, halolower alkyl, hydroxy, cyano, amino, mono- or diloweralkyl amino, C.sub.2 -C.sub.7 alkanoylamino, carboxy, carboxylower alkyl, hydroxyloweralkyl, carbamoyl, carbamoyloxy, lower alkyl- or aryl-carbonyl, (lower alkoxy)-lower alkoxy, phenyl or a phenyl group itself optionally substituted by a substituent as hereinbefore defined excepting phenyl, or an adjacent pair of R.sup.1-4 together with the carbon atoms to which they are attached complete a six membered unsaturated carbocyclic or nitrogen containing heterocyclic ring, optionally substituted by one or more of the substituents listed above for R.sup.1 ; m represents 0 or 1; and R.sup.5, R.sup.6, R.sup.7 and R.sup.8 independently represent hydrogen or a substituent selected from lower alkyl, lower alkoxy, halogen, alkanoyloxy of 2 to 7 carbon atoms, lower alkoxycarbonyl and hydroxy and the term `lower` means a group containing 1 to 6 carbon atoms; which compounds possess antisecretory activity and are useful for the treatment of hypersecretion or ulcers.