作者:Emily J. Hanan、Anne van Abbema、Kathy Barrett、Wade S. Blair、Jeff Blaney、Christine Chang、Charles Eigenbrot、Sean Flynn、Paul Gibbons、Christopher A. Hurley、Jane R. Kenny、Janusz Kulagowski、Leslie Lee、Steven R. Magnuson、Claire Morris、Jeremy Murray、Richard M. Pastor、Tom Rawson、Michael Siu、Mark Ultsch、Aihe Zhou、Deepak Sampath、Joseph P. Lyssikatos
DOI:10.1021/jm3012239
日期:2012.11.26
The discovery of somatic Jak2 mutations in patients with chronic myeloproliferative neoplasms has led to significant interest in disc-ova-ring selective Jak2 inhibitors for use in treating these disorders. A high-throughput screening effort identified the pyrazolo[1,5-a]pyrimidine scaffold as a potent inhibit-or of Jak2. Optimization of lead compounds 7a-b and 8 in this chemical series for activity against Jak2, selectivity against other Jak family kinases, and good in vivo pharmacokinetic properties led to the discovery of 7j. In a SET2 xenograft model that is dependent on Jak2 for growth, 7j demonstrated a time-dependent knock-down of pSTAT5, a downstream target of Jak2.