1444335-07-2Relevant articles and documents
Novel pyridine bioisostere of cabozantinib as a potent c-met kinase inhibitor: Synthesis and anti-tumor activity against hepatocellular carcinoma
Karmacharya, Ujjwala,Guragain, Diwakar,Chaudhary, Prakash,Jee, Jun-Goo,Kim, Jung-Ae,Jeong, Byeong-Seon
, (2021/09/10)
Two novel bioisosteres of cabozantinib, 3 and 4, were designed and synthesized. The ben-zene ring in the center of the cabozantinib structure was replaced by trimethylpyridine (3) and pyridine (4), respectively. Surprisingly, the two compounds showed extremely contrasting mesenchy-mal–epithelial transition factor (c-Met) inhibitory activities at 1 μM concentration (4% inhibition of 3 vs. 94% inhibition of 4). The IC50 value of compound 4 was 4.9 nM, similar to that of cabozantinib (5.4 nM). A ligand-based docking study suggested that 4 includes the preferred conformation for the binding to c-Met in the conformational ensemble, but 3 does not. The anti-proliferative activity of compound 4 against hepatocellular carcinoma (Hep3B and Huh7) and non-small-cell lung cancer (A549 and H1299) cell lines was better than that of cabozantinib, whereas 3 did not show a signifi-cant anti-proliferative activity. Moreover, the tumor selectivity of compound 4 toward hepatocellu-lar carcinoma cell lines was higher than that of cabozantinib. In the xenograft chick tumor model, compound 4 inhibited Hep3B tumor growth to a much greater extent than cabozantinib. The present study suggests that compound 4 may be a good therapeutic candidate against hepatocellular carci-noma.
Synthesis method of aminopyridine compounds
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Paragraph 0067-0068, (2020/10/14)
The invention provides a synthesis method of aminopyridine compounds. The synthesis method of the aminopyridine compounds comprises the following steps: under a heating condition, halogenated pyridineorganic matters and an ammoniation reagent are subjected to an ammoniation reaction to obtain an ammoniated product system, wherein in the ammoniation reaction, the temperature of the ammoniation reaction is 200-240 DEG C, and the ammoniation reagent is in a solid state and can be decomposed to generate ammonia gas; and the ammoniated product system is sequentially purified and salified to obtainthe aminopyridine compounds. The synthesis method does not need to add a solvent, so that the yield of three wastes can be greatly reduced; the type of the ammonification reagent and the ammonification reaction temperature are limited during the reaction process, such that the high reaction rate and the high conversion rate can be obtained without the addition of the catalyst, and the purification and salification process after the ammonification reaction is simple and has the good separation effect so as to substantially reduce the production cost and improve the product yield and the product purity. In addition, the synthesis method also has the advantages of good repeatability and the like.
Synthesis, activity and mechanism of alkoxy-, carbamato-, sulfonamido-, thioureido-, and ureido-derivatives of 2,4,5-trimethylpyridin-3-ol against inflammatory bowel disease
Chaudhary, Chhabi Lal,Gurung, Pallavi,Jang, Seoul,Banskota, Suhrid,Nam, Tae-Gyu,Kim, Jung-Ae,Jeong, Byeong-Seon
, p. 1 - 20 (2019/10/28)
Inflammatory bowel disease (IBD) is a chronic immuno-inflammation in gastrointestinal tract. We have evaluated the activity of the compounds to inhibit the adhesion of monocytes to colon epithelial cells is triggered by a pro-inflammatory cytokine, tumour necrosis factor (TNF)-α. The in vitro activity of the compounds, 13b (an ureido-derivative), 14c, 14j, 14k, 14n (thioureido-), 18c and 18d (sulfonamido-), was in correlation with in vivo anti-colitis activity revealed as significant recovery in body- and colon-weights and colon myeloperoxidase level, a biochemical marker of inflammation reflecting neutrophil infiltration. In vivo, TNBS-induced changes in the expression of inflammatory cytokines (TNF-α, IL-6, IL-1β, IL-10, and TGF-β), NLRP3 inflammasome components (NLRP-3, Caspase-1, and IL-18), and epithelial junction molecules (E-cadherin, claudin2/3, and ZO-1) were blocked and recovered by oral administration of the compounds (1 mg/kg). Compound 14n which showed the best efficacy can be a promising lead for orally available therapeutics for pathology of IBD.
