Aminoalkyl-substituted thiazolin-2-ones, the preparation and use thereof

An aminoalkyl-substituted thiazolin-2-one of the formula I ##STR13## where R.sup.1 is H or C.sub.1 -C.sub.5 -alkyl,

• R.sup.2 is H or C.sub.1 -C.sub.5 -alkyl,
• n is an integer from 1 to 6,
• A is ##STR14## where Ar is phenyl which is unsubstituted or monosubstituted by C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy, halogen, nitro, hydroxyl, C.sub.1 -C.sub.5 -alkylthio, trifluoromethyl or cyano, or is pyridyl, pyrimidinyl or thienyl, R.sup.3 is H or C.sub.1 -C.sub.5 -alkyl, and R.sup.4 is phenyl which is unsubstituted or monosubstituted by C.sub.1 -C.sub.5 -alkyl, C.sub.1 C.sub.5 -alkoxy, halogen, hydroxyl or trifluoromethyl, or is thienyl, and its tautomers and salts of this compounds with physiologically tolerated acids.