A series of 3-acylaminomethyl-6-(chloro, iodo and methyl)-2-(phenyl,
4′-t-butylphenyl, 4′-cyclohexyl- phenyl, biphenyl-4′-yl,
4′-chlorophenyl and
4′-iodophenyl)imidazo[1,2-b]pyridazines
and imidazo[1,2- a]pyridines has been prepared
and examined for interaction with central and mitochondrial (peripheral- type)
benzodiazepine receptors. The
imidazo[1,2-b]pyridazines were generally more
selective for the mitochondrial receptors than the corresponding
imidazo[1,2-a]pyridines. Of these compounds,
3-
acetamidomethyl-2-(biphenyl-4′-yl)-6-chloroimidazo[1,2-b]pyridazine
(9) proved to be the most selective in studies of the displacement of
[3H]diazepam from peripheral-type and central
benzodiazepine receptors (IC50 2·8 nM and
0% displacement at 1000 nM, respectively).
4′-叔丁基苯基、4′-环己基苯基、4′-联苯基、
4′-氯苯基和
4′-环己基苯基、4′-联苯基、4′-氯苯基和 4′-碘苯基)咪唑并[1,2-b]哒嗪
和咪唑并[1,2-a]吡啶的相互作用进行了研究。
和咪唑并[1,2-a]吡啶的相互作用进行了研究。
苯并二氮杂卓受体的相互作用。这些
咪唑并[1,2-b]哒嗪对线粒体受体的选择性通常更高。
比相应的咪唑并[1,2-b]哒嗪对线粒体受体的选择性更强。
咪唑并[1,2-a]吡啶对线粒体受体的选择性更强。在这些化合物中
3-
乙酰胺基甲基-2-(联苯-4′-基)-6-氯咪唑并[1,2-b]哒嗪 (9)
(9) 在研究[3H]二氮杂卓的位移时被证明是最具选择性的。
[3H]地西泮从外周型和中枢型苯并二氮杂卓受体(IC
的选择性(IC50 2-8 nM 和
0% displacement at 1000 nM)。