[3<i>a</i>,4]-Dihydropyrazolo[1,5<i>a</i>]pyrimidines: Novel, Potent, and Selective Phosphatidylinositol-3-kinase β Inhibitors
                                
                                    
                                        作者:Hongyi Yu、Michael L. Moore、Karl Erhard、Mary Ann Hardwicke、Hong Lin、Juan I. Luengo、Jeanelle McSurdy-Freed、Ramona Plant、Junya Qu、Kaushik Raha、Cynthia M. Rominger、Michael D. Schaber、Michael D. Spengler、Ralph A. Rivero                                    
                                    
                                        DOI:10.1021/ml300330m
                                    
                                    
                                        日期:2013.2.14
                                    
                                    A series of novel [3a,4]dihydropyrazolo[1,5a]pyrimidines were identified, which were highly potent and selective inhibitors of PI3K beta. The template afforded the opportunity to develop novel SAR for both the hinge-binding (R-3) and back-pocket (R-4) substitutents. While cellular potency was relatively modest due to high protein binding, the series displayed low clearance in rat, mouse, and monkey.