New Pyrrolo[2,1-<i>f</i>]purine-2,4-dione and Imidazo[2,1-<i>f</i>]purine-2,4-dione Derivatives as Potent and Selective Human A<sub>3</sub> Adenosine Receptor Antagonists
作者:Pier Giovanni Baraldi、Delia Preti、Mojgan Aghazadeh Tabrizi、Francesca Fruttarolo、Romeo Romagnoli、Naser Abdel Zaid、Allan R. Moorman、Stefania Merighi、Katia Varani、Pier Andrea Borea
DOI:10.1021/jm058008c
日期:2005.7.1
Compounds presenting an additional fused ring on the xanthine nucleus have been reported to exhibit antagonistic activity with various levels of affinity and selectivity toward the four adenosine receptors subtypes A(1) A(2A), A(2B), and A(3). This paper reports synthesis and biological evaluation of new 1-benzyl-3-propyl-IH,6H-pyrrolo[2,1-f]purine-2,4-diones and 1-benzyl-3propyl- 1H,8H-imidazo [2, 1-f] purine-2,4-diones, among which we identified potent and selective A(3) adenosine receptors antagonists. In particular, 1-benzyl-7-methyl-3-propyl-IH,8H-imidazo[2,1-f]purine-2,4-dione (11e) shows a K-i (hA(3)) value from binding assay of 0.8 nM.