| 摘要 |
The present invention relates to imidazo[1,2-b]-pyridazines having the formula: <IMAGE> (I) in which: R1 represents hydrogen, a halogen atom, a C1-C4 alkoxy group or a C1-C4 alkyl group occupying one of the free positions of the benzene ring; R2 represents hydrogen, a C1-C4 alkyl group or a phenyl group; R3 denotes hydrogen, a C1-C4 alkyl group or a phenyl group; and R4 R5 represent hydrogen or a C1-C4 alkyl group, or R4 and R5 form, together with the nitrogen atom to which they are bonded, a 5-membered or 6-membered heterocycle optionally containing a second heteroatom. Application: drugs, especially for the treatment of cortical cholinergic deficiencies.
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