GB8408447D0 — 1,2,4-thiadiazines

USPTO Abstract

Novel 1,2,4-thiadiazines of the formula <IMAGE> I wherein R3 is selected from the group consisting of hydrogen, -OH, -CF3, alkyl, alkoxy and alkylthio of 1 to 6 carbon atoms, cycloalkyl of 3 to 6 carbon atoms optionally substituted with alkyl of 1 to 6 carbon atoms and <IMAGE> R1 and R2 are individually selected from the group consisting of hydrogen and alkyl of 1 to 3 carbon atoms or taken together with the nitrogen to which they are attached form a saturated heterocycle of 4 to 8 carbon atoms optionally containing a heteroatom of the group consisting of -O-, -S- and <IMAGE> and R' is hydrogen or alkyl of 1 to 3 carbon atoms, R5 is <IMAGE> R4 is selected from the group consisting of hydrogen, halogen and alkyl and alkoxy of 1 to 3 carbon atoms, R6 is selected from the group consisting of hydrogen, halogen and alkyl of 1 to 3 carbon atoms with the proviso that R6 may represent halogen only when R3 is hydrogen, -OH, alkyl and alkoxy of 1 to 6 carbon atoms or cycloalkyl of 3 to 6 carbon atoms optionally substituted with alkyl of 1 to 6 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having a remarkable anxiolytic activity and novel intermediates.