Design and synthesis of novel pyrimido[4,5- b ]azepine derivatives as HER2/EGFR dual inhibitors
作者:Youichi Kawakita、Masaki Seto、Tomohiro Ohashi、Toshiya Tamura、Tadashi Yusa、Hiroshi Miki、Hidehisa Iwata、Hidenori Kamiguchi、Toshimasa Tanaka、Satoshi Sogabe、Yoshikazu Ohta、Tomoyasu Ishikawa
DOI:10.1016/j.bmc.2013.02.014
日期:2013.4
A novel 7,6 fused bicyclic scaffold, pyrimido[4,5-b]azepine was designed to fit into the ATP binding site of the HER2/EGFR proteins. The synthesis of this scaffold was accomplished by an intramolecular Claisen-type condensation. As the results of optimization lead us to 4-anilino and 6-functional groups, we discovered 6-substituted amide derivative 19b, which has a 1-benzothiophen-4-yloxy group attached
一种新型的7,6融合双环支架,嘧啶[4,5- b ]氮杂被设计为适合HER2 / EGFR蛋白的ATP结合位点。该支架的合成是通过分子内克莱森型缩合完成的。作为最优化的结果,我们将我们带到了4-苯胺基和6-官能团,我们发现了6-取代的酰胺衍生物19b,其具有与4-苯胺基连接的1-苯并噻吩-4-基氧基。19b与EGFR的X射线共晶体结构表明嘧啶基[4,5- b]的N-1和N-3氮氮杂骨架通过水介导的氢键网络分别与Met793的主链NH和Thr854的侧链发生氢键相互作用。此外,正如我们预期的那样,9位的NH质子与Met793的羰基形成一个额外的氢键。化合物19b的显示有效的HER2 / EGFR激酶(IC 50:24/36 1nM)和BT474细胞的生长(GI 50:18纳米)根据它的伪不可逆的(PI)轮廓的抑制活性。