10.1016/j.bmc.2009.01.060
This research aims to synthesize and evaluate a series of 2-phenyl-9-benzyl-8-azapurines with an amido group at the 6 position as potential ligands for adenosine receptors, particularly focusing on the A1 subtype. The study involves synthesizing compounds with various substituents at the 6 position and testing their affinity for A1, A2A, and A3 adenosine receptors through radioligand binding assays. The results show that many of these compounds exhibit high affinity and selectivity for the A1 receptor compared to A2A and A3 receptors. Based on the biological data, QSAR models were developed using multiple linear regression and decision trees to predict the activity of new compounds. The models suggest that certain structural features, such as the presence of a cyclohexyl group, contribute to high affinity and selectivity for the A1 receptor. The study concludes that these findings can guide the design of new selective A1 adenosine receptor ligands, which have potential therapeutic applications. Key chemicals used in the research include 2-phenyl-9-benzyl-8-azapurines, various acyl chlorides for introducing different substituents, and radioligands like [3H]DPCPX, [3H]ZM241385, and [3H]NECA for binding assays.