PYRIDAZINE DERIVATIVE AMINO-SUBSTITUTED IN THE 3-POSITION AND PHARMACEUTICAL COMPOSITION CONTAINING THEM

摘要

The invention relates to the pyridazine derivatives of the formula: Ia or Ib in which R1 is H, a substituted or unsubstituted phenyl group, a naphthyl group, a cyclohexyl group, a thien-2-yl group, a thien-3-yl group or an indol-3-yl group, R2 is H or an alkyl or phenyl group, R3 is H, an alkyl, or phenyl group in formula Ib and a cyano group in formula Ia, and Alk is (CH2)n where n is 2, 3 or 4, or -CH2-C=C-, and X- is halide, a process for the preparation of the said products and their application as medicaments.