N9-Benzyl-substituted 1,3-dimethyl- and 1,3-dipropyl-pyrimido[2,1-f]purinediones: Synthesis and structure–activity relationships at adenosine A1 and A2A receptors
作者:Anna Drabczyńska、Christa E. Müller、Janina Karolak-Wojciechowska、Britta Schumacher、Anke Schiedel、Olga Yuzlenko、Katarzyna Kieć-Kononowicz
DOI:10.1016/j.bmc.2007.04.018
日期:2007.7
affinity to adenosine A1 and A2A receptors, selected compounds were additionally investigated for affinity to the A3 receptor subtype. The results of the radioligand binding assays to A1 and A2A adenosine receptors showed that most of the 1,3-dimethyl-9-benzylpyrimidopurinediones exhibited selective affinity to A2A receptors at micromolar or submicromolar concentrations (for example, derivative 9 with o-methoxy
描述了N-苄基嘧啶[2,1-f]嘌呤二酮的合成及其理化性质。这些衍生物是通过将7-氯丙基o-8-溴-1,3-二甲基-或1,3-二丙基黄嘌呤衍生物与相应的(未)取代的苄胺环合而合成的。也可以在微波辐射条件下获得二丙基衍生物。评价获得的化合物(1-20)对腺苷A1和A2A受体的亲和力,另外研究所选化合物对A3受体亚型的亲和力。放射性配体对A1和A2A腺苷受体的结合测定结果表明,大多数1,3-二甲基-9-苄基嘧啶嘌呤二酮在微摩尔或亚微摩尔浓度下均表现出对A2A受体的选择性亲和力(例如,具有邻甲氧基取代基的衍生物9在大鼠A2A受体上的Ki值为0.699 microM,选择性超过36倍。与先前描述的芳基嘧啶并[2,1-f]嘌呤二酮二丙基衍生物(化合物15-20)相反,对两种受体的亲和力均增加,但A1亲和力增加的幅度更大,结果取消了A2A的选择性。最佳的腺苷A1受体配体是间氯苄基衍生物18(Ki = 0