87597-22-6Relevant academic research and scientific papers
Derives N-nitres et N-nitroses en serie tetrahydro-5,6,7,8 imidazopyrazinique : obtention et determination par RMN 1H des configurations Z et E.
Bonnet, Pierre-Antoine,Sablayrolles, Claire,Chapat, Jean-Pierre
, p. 468 - 480 (2007/10/02)
Les derives N-nitres et N-nitroses en serie tetrahydro-5,6,7,8 imidazopyrazinique sont obtenus simultanement lors de la nitration par HNO3 (d = 1.51) en milieu sulfurique.L'analyse des isomeres N-nitroses Z et E met en evidence l'apparition preponderante de la forme Z ainsi qu'une restriction importante a son equilibration.La stabilite particuliere de l'isomere Z est attribuee a l'existence d'une assistance electronique preferentielle entre groupement nitroso et protons en position 8.
Synthesis of imidazo[1,2-a]pyrazine derivatives with uterine-relaxing, antibronchospastic, and cardiac-stimulating properties
Sablayrolles,Cros,Milhavet,Rechenq,Chapat,Boucard,Serrano,McNeill
, p. 206 - 212 (2007/10/02)
A series of imidazo[1,2-a]pyrazine derivatives was synthesized by condensation of α-halogenocarbonyl compounds and aminopyrazines. Various compounds resulted from competitive reactions or reagent isomerization and demonstrated in vitro uterine-relaxing and in vivo antibronchospastic activities. On isolated atria, 5-bromoimidazo[1,2-a]pyrazine showed positive chronotropic and inotropic properties; the latter was associated with an increase in the cyclic AMP tissue concentration. Potentiation of the isoproterenol positive inotropic effect of 5-bromoimidazo[1,2-a]pyrazine and the lack of blockade of the 5-bromoimidazo[1,2-a]pyrazine positive inotropic effect by propranolol suggested phosphodiesterase-inhibiting properties.
