A number of derivatives structurally related to cirazoline (1) were synthesized and studied with the purpose of modulating alpha2-adrenoreceptors selectivity versus both alpha1-adrenoreceptors and I2 imidazoline binding sites. The most potent alpha2-agonist was 2-[1-(biphenyl-2-yloxy)ethyl]-4,5-dihydro-1H-imidazole (7), whose key pharmacophoric features closely matched those found in the alpha2-agonist 2-(3-exo-(3-phenylprop-1-yl)-2-exo-norbornyl)amino-2-oxazoline (15). (S)-(-)-7 was the most potent of the two enantiomers, confirming the stereospecificity of the interaction with alpha2-adrenoreceptors. This eutomer was tested on two algesiometric paradigms and, because of the interaction with alpha2-adrenoreceptors, showed a potent and long-lasting antinociceptive activity, since it was abolished by the selective alpha2-antagonist RX821002.

Alpha(2)-adrenoreceptors profile modulation and high antinociceptive activity of (S)-(-)-2-[1-(biphenyl-2-yloxy)ethyl]-4,5-dihydro-1H-imidazole

GENTILI, Francesco;GIANNELLA, Mario;MARUCCI, Gabriella;PERFUMI, Marina Cecilia;PIERGENTILI, Alessandro;QUAGLIA, Wilma;PIGINI, Maria
2002-01-01

Abstract

A number of derivatives structurally related to cirazoline (1) were synthesized and studied with the purpose of modulating alpha2-adrenoreceptors selectivity versus both alpha1-adrenoreceptors and I2 imidazoline binding sites. The most potent alpha2-agonist was 2-[1-(biphenyl-2-yloxy)ethyl]-4,5-dihydro-1H-imidazole (7), whose key pharmacophoric features closely matched those found in the alpha2-agonist 2-(3-exo-(3-phenylprop-1-yl)-2-exo-norbornyl)amino-2-oxazoline (15). (S)-(-)-7 was the most potent of the two enantiomers, confirming the stereospecificity of the interaction with alpha2-adrenoreceptors. This eutomer was tested on two algesiometric paradigms and, because of the interaction with alpha2-adrenoreceptors, showed a potent and long-lasting antinociceptive activity, since it was abolished by the selective alpha2-antagonist RX821002.
2002
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/114843
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