Pyridazine derivatives substituted by cyclic amines and process forpreparing thereof

Pyridazinamines of the formula and their pharmaceutically acceptable acid addition salts and/or possible stereochemically isomeric forms and/or tautomeric forms for use as medicines in particular for use as anti-viral agents; pharmaceutical compositions containing such compounds as an active ingredient and a method of preparing such compositions; novel pyridazinamines of the fnrmula and a method of preparing said compounds