Design and synthesis of novel DFG-out RAF/vascular endothelial growth factor receptor 2 (VEGFR2) inhibitors: 3. Evaluation of 5-amino-linked thiazolo[5,4-d]pyrimidine and thiazolo[5,4-b]pyridine derivatives
作者:Masaaki Hirose、Masanori Okaniwa、Tohru Miyazaki、Takashi Imada、Tomohiro Ohashi、Yuta Tanaka、Takeo Arita、Masato Yabuki、Tomohiro Kawamoto、Shunichirou Tsutsumi、Akihiko Sumita、Terufumi Takagi、Bi-Ching Sang、Jason Yano、Kathleen Aertgeerts、Sei Yoshida、Tomoyasu Ishikawa
DOI:10.1016/j.bmc.2012.07.032
日期:2012.9
N-methylation of the amine linker could control the twisted molecular conformation leading to improved solubility. These approaches produced N-methyl thiazolo[5,4-b]pyridine-5-amine derivative 5. To maximize the in vivo efficacy, we attempted salt formation of 5. Our result indicated that the besylate monohydrate salt form (5c) showed significant improvement of both solubility and oral absorption. Owing to
我们的目的是发现具有强活性和足够口服吸收的RAF /血管内皮生长因子受体2(VEGFR2)抑制剂,因此,我们选择了5-氨基连接的噻唑并[5,4- d ]嘧啶衍生物作为前导物化合物具有潜在的激酶抑制活性和所需的溶解性。根据BRAF的X射线共晶体结构数据,设计了新颖的1-氰基-1-甲基乙氧基叔取代基,以占据BRAF“后袋”的疏水区域。另外,我们发现胺连接基的N-甲基化可以控制扭曲的分子构象,从而导致溶解度的提高。这些方法产生了N-甲基噻唑并[5,4 - b ]吡啶-5-胺衍生物5。为了使体内功效最大化,我们尝试了5的成盐作用。我们的结果表明,苯磺酸盐一水合物盐形式(5c)在溶解度和口服吸收方面均表现出显着改善。由于改善的理化特性,化合物5c在HT-29异种移植模型中显示出了抗肿瘤退行的功效。