Heterocyclically substituted piperazinoakylbenzoxazine and piperazinoalkylbenzothiazine compounds, processes for preparing them, and medicaments containing them

A compound corresponding to the formula I ##STR28## wherein X denotes oxygen or sulfur,

• Y denotes oxygen or sulfur,
• R.sup.1 denotes hydrogen or lower alkyl,
• R.sup.2 denotes hydrogen, lower alkyl, halogen, lower alkoxy, hydroxy, nitro or trifluoromethyl, and
• R.sup.3 denotes hydrogen, lower alkyl, halogen or lower alkoxy, or
• R.sup.2 and R.sup.3 are bonded to adjacent carbon atoms and together denote an alkylenedioxy group having 1-2 carbon atoms,
• n is an integer from 0 to 4, and
• R.sup.4 is a 6-membered unsaturated heterocycle containing 1 or 2 nitrogen atoms not directly bonded to the piperazine ring, said heterocycle being substituted by 0 to 2 substituents bonded to carbon atoms selected from the group consisting of lower alkyl, lower alkoxy and halogen,
• and physiologically acceptable acid addition salts thereof.