HQSAR and molecular docking studies of furanyl derivatives as adenosine A2A receptor antagonists

Abstract

Structure- and ligand-based computational design strategies were used to understand the molecular requirements of furanyl derivatives 2-(furan-2-yl)-[1,2,4]triazolo[1,5-f]pyrimidin-5-amines (TfPAs), 2-(furan-2-yl)-[1,2,4]triazolo[1,5-a]pyrazin-8-amine (TaPAs), and 2-(furan-2-yl)-[1,2,4]triazolo[1,5-a][1,3,5]triazin-7-amines (TTAs) as adenosine A2A receptor (A2AR) antagonists. First, we studied the structure–activity relationship of the selected compounds using hologram quantitative structure–activity relationship (HQSAR) methodology. The best model (training set included 67 compounds) included fragment parameters such as atoms (A), bonds (B), connections (C), and donors/acceptors groups (DA) and had a good q2 value of 0.776 including size fragments of 7–10 and the hologram length of 199. It also predicted adequately the compounds contained in the test set (10 compounds). In addition, we studied the binding orientations of the higher and less active compounds using flexible molecular docking. We found orientations that are in agreement with previous reports.