4-(Benzimidazol-2-yl)-1,2,5-oxadiazol-3-ylamine derivatives: Potent and selective p70S6 kinase inhibitors
作者:Upul Bandarage、Brian Hare、Jonathan Parsons、Ly Pham、Craig Marhefka、Guy Bemis、Qing Tang、Cameron Stuver Moody、Steve Rodems、Sundeep Shah、Chris Adams、Jose Bravo、Emmanuelle Charonnet、Vladimir Savic、Jon H. Come、Jeremy Green
DOI:10.1016/j.bmcl.2009.07.022
日期:2009.9
We report herein the design and synthesis of 4-(benzimidazol-2-yl)-1,2,5-oxadiazol-3-amine derivatives as inhibitors of p70S6 kinase. Screening hits containing the 4-(benzimidazol-2-yl)-1,2,5-oxadiazol-3-ylamine scaffold were optimized for p70S6K potency and selectivity against related kinases. Structure-based design employing an active site homology model derived from PKA led to the preparation of benzimidazole 5-substituted compounds 26 and 27 as highly potent inhibitors (K-i < 1 nM) of p70S6K, with > 100-fold selectivity against PKA, ROCK and GSK3. (C) 2009 Elsevier Ltd. All rights reserved.