Two novel series of 6,7-disubstituted-4-(2-fluorophenoxy)quinoline derivatives bearing 1H-imidazole-4-carboxamido or (E)-3-hydrosulfonylacrylamido motifs (16–31 and 32–42) were designed, synthesized and evaluated for their in vitro cytotoxic activity. Most of the compounds exhibited moderate to excellent potency against tested three cell lines, and fifteen compounds were further examined for their inhibitory activity against c-Met kinase. The most promising compound 16 (c-Met kinase [IC₅₀] = 1.1 nM) demonstrated high selectivity and remarkable cytotoxicity against HT-29, MKN-45 and A549 cells with IC₅₀ values of 0.08, 0.22 and 0.07 μM, which were 3.1-, 1.4- and 2.1-fold more active than Foretinib. The preliminary structure-activity relationships as well as molecular docking disclosed that 1H-imidazole-4-carboxamido as a linker was of great importance for the antitumor activity.

设计，合成了两个带有1 H-咪唑-4-羧酰胺基或（E）-3-氢磺酰基丙烯酰胺基序的新型6,7-二取代-4-（2-氟苯氧基）喹啉衍生物（16 – 31和32 – 42）。并评估其体外细胞毒性活性。大多数化合物对测试的三种细胞系表现出中等至优异的效力，并且进一步检查了十五种化合物对c-Met激酶的抑制活性。最有前途的化合物16（c-Met激酶[IC ₅₀ ] = 1.1 nM）对具有IC的HT-29，MKN-45和A549细胞表现出高选择性和显着的细胞毒性_50个值0.08、0.22和0.07μM，它们的活性是福瑞替尼的3.1倍，1.4倍和2.1倍。初步的结构-活性关系以及分子对接表明，1 H-咪唑-4-羧酰胺基作为连接基对于抗肿瘤活性非常重要。