The role of 5-arylalkylamino- and 5-piperazino- moieties on the 7-aminopyrazolo[4,3-<i>d</i>]pyrimidine core in affecting adenosine A<sub>1</sub> and A<sub>2A</sub> receptor affinity and selectivity profiles
作者:Lucia Squarcialupi、Marco Betti、Daniela Catarzi、Flavia Varano、Matteo Falsini、Annalisa Ravani、Silvia Pasquini、Fabrizio Vincenzi、Veronica Salmaso、Mattia Sturlese、Katia Varani、Stefano Moro、Vittoria Colotta
DOI:10.1080/14756366.2016.1247060
日期:2017.1.1
New 7-amino-2-phenylpyrazolo[4,3-d]pyrimidine derivatives, substituted at the 5-position with aryl(alkyl)amino- and 4-substituted-piperazin-1-yl- moieties, were synthesized with the aim of targeting human (h) adenosine A1 and/or A2A receptor subtypes. On the whole, the novel derivatives 1-24 shared scarce or no affinities for the off-target hA2B and hA3 ARs. The 5-(4-hydroxyphenethylamino)- derivative
合成了新的7-氨基-2-苯基吡唑并[4,3-d]嘧啶衍生物,该衍生物在5-位被芳基(烷基)氨基和4-取代的哌嗪-1-基部分取代,目的是:靶向人(h)腺苷A1和/或A2A受体亚型。总体而言,新的衍生物1-24对脱靶hA2B和hA3 ARs缺乏亲和力或没有亲和力。5-(4-羟基苯乙氨基)-衍生物12对hA2A AR表现出良好的亲和力(Ki = 150 nM)和最佳选择性,而5-苄基氨基取代的5显示出最佳的hA2A(Ki = 123 nM)和A1组合AR亲和力(Ki = 25 nM)。5-苯乙基氨基部分(化合物6)实现了纳摩尔亲和力(Ki = 11 nM)和对hA1 AR的良好选择性。5-(N4-取代的哌嗪-1-基)衍生物15-24以高纳摩尔范围内的亲和力结合hA1 AR亚型。