Discovery of pyrazolo[1,5-a]pyridines as p110α-selective PI3 kinase inhibitors
摘要:
We have made a novel series of pyrazolo[1,5-a]pyridines as PI3 kinase inhibitors, and demonstrated their selectivity for the p110 alpha isoform over the other Class Ia PI3 kinases. We investigated the SAR around the pyrazolo[1,5-a] pyridine ring system, and found compound 5x to be a particularly potent example (p110 alpha IC50 0.9 nM). This compound inhibits cell proliferation and phosphorylation of Akt/PKB, a downstream marker of PI3 kinase activity, and showed in vivo activity in an HCT-116 human xenograft model. (C) 2011 Elsevier Ltd. All rights reserved.
描述了在存在或不存在BF 3 ·OEt 2的情况下,使用Mg-和Zn-TMP碱基(TMP = 2,2,6,6-四甲基哌啶基)对吡唑并[1,5- a ]吡啶骨架进行的区域选择性官能化。另外,将具有酯官能团(和NHBoc或乙基)的各种官能化的吡唑并[1,5- a ]吡啶进行镁化和官能化,从而形成多取代的杂环。另外,据报道使用亚硫酸镁直接进行亚金属的邻位金属化,然后进行吡唑并[1,5- a ]吡啶亚砜的无过渡金属的胺化。