Imidazo[1,2-b]pyridazines. XIII. Syntheses and Central Nervous System Activities of Some 2-Benzyl(phenethyl, biphenyl-4'-yl, 6'-methylnaphthalen-2'-yl, t-Butyl and cyclohexyl)-3-methoxy(acylaminomethyl and dimethylaminomethyl)-6-(variously substituted)imidazo[1,2-b]pyridazines

Abstract

6-(Variously substituted)-3-methoxy(unsubstituted, dimethylaminomethyl, acetamidomethyl and benzamidomethy1)-2-benzyl(phenethyl, biphenyl-4'-yl, 6'-methylnaphthalen-2'-yl, t-butyl and cyclohexyl)imidazo[1,2-b] pyridazines have been prepared and examined for activity in the central nervous system. Of these, 2-benzyl-3-methoxy-6-(3'-methoxybenzylamino) imidazo[1,2-b]pyridazine (IC₅₀ 88nM) bound most strongly to rat brain membrane.

In general, the order of activity for groups at the 2-position was Ph > PhCH₂ > PhCH₂CH₂ > C₆H₄Ph-p, 6'-methylnaphthalen-2'-yl, c-C₆H₁₁ or Bu^t.