Abstract Heating ethyl 5-sulfamoyl-2-methoxybenzoate with a series of twelve 3-(tert. amino) propylamines (IIIa-IIIl) afforded the title compounds IIa-IIl which were transformed to salts and subjected to pharmacological screening as potential neuroleptics of the sulpiride series. Only compounds IId (hydrogen oxalate, VUFB-15 453) and IIg (methanesulfonate, VUFB-15 397) showed indications of the desired psychotropic activity.