Benzothiazine and benzothiadiazine compounds

摘要

Compounds of formula (I): wherein: R₁ represents hydrogen, a halogen or alkyl, R_1a represents hydrogen or alkyl, R₂ represents hydrogen, a halogen or hydroxy, A represents NR₄, R₃ represents hydrogen, alkyl or cycloalkyl, R₄ represents hydrogen or alkyl, X is as defined in the description, their isomers, and also addition salts thereof. Medicinal products containing the same which are useful in treating disorders of the AMPA system.