both c-Met and VEGFR2 kinase activities. Further optimization resulted in pyrazolone and pyridone derivatives, which could form intramolecular hydrogen bonds to enforce a rigid conformation, thereby producing potent inhibition. One compound of particular note was the imidazo[1,2-a]pyridine derivative (26) bearing a 6-methylpyridone ring, which strongly inhibited both c-Met and VEGFR2 enzyme activities
为了鉴定对各种人类癌症具有有效抗肿瘤功效的化合物,我们旨在合成可以抑制c-间质上皮转化因子(c-Met)和血管内皮生长因子受体2(V
EGFR2)激酶的化合物。我们通过将c-Met和V
EGFR2的共晶体结构信息与已知
抑制剂配合使用,设计了对位取代
抑制剂。这导致鉴定出能够抑制c-Met和V
EGFR2激酶活性的化合物3a和3b。进一步的优化产生了
吡唑啉酮和
吡啶酮衍
生物,它们可以形成分子内的氢键来增强刚性构象,从而产生有效的抑制作用。一种特别值得注意的化合物是
咪唑并[1,2-带有6-
甲基吡啶酮环的]
吡啶衍生物(26),能强烈抑制c-Met和V
EGFR2酶活性(IC 50 = 1.9,2.2 nM),以及c-Met依赖的MKN45细胞和V
EGF-的增殖刺激的人脐静脉内皮细胞(IC 50 = 5.0,1.8 nM)。化合物26在MKN45(治疗/对照比[ T / C ] = 4%,口服,5 mg /