1,2,3-Triazole[4,5-d]pyridazines--II. New derivatives tested on adenosine receptors

This paper reports the synthesis and biological evaluation towards A1 and A2 adenosine receptors of new 1,2,3-triazole[4,5-d]pyridazines bearing lipophilic substituents in the 1 position. Some 1-benzyl-4-substituted amino derivatives were prepared and the cyclohexylamino-, anilino- and p-toluidino- derivatives showed an interesting moderately selective activity on the A1 receptor.