Synthesis of New <i>N</i><sup>1</sup>-Substituted-5-aryl-3-(3,4,5-trimethoxyphenyl)-2-pyrazoline Derivatives as Antitumor Agents Targeting the Colchicine Site on Tubulin
Divergent Strategy for the Diastereoselective Synthesis of the Tricyclic 6,7-Diaryltetrahydro-6<i>H</i>-benzo[<i>c</i>]chromene Core via Pt(IV)-Catalyzed Cycloaddition of <i>o</i>-Quinone Methides and Olefin Ring-Closing Metathesis
A divergent strategy for the synthesis of the tricyclic 6,7-diaryltetrahydro-6H-benzo[c]chromene core was successfully developed. The 2,3-trans, 2,4-cis trisubstituted chroman moiety was formed via highly efficient and stereoselective Pt(IV)-catalyzed cycloadditionreactions of the corresponding quinone methides with chalcones. Subsequent steps provided the common diene alcohol, which underwent BF3·Et2O-mediated
成功开发了一种合成三环6,7-二芳基四氢-6 H-苯并[ c ]色烯核心的不同策略。2,3-反式,2,4-顺式三取代的苯并二氢吡喃部分是通过相应的醌甲基化物与查耳酮的高效且立体选择性的Pt(IV)催化的环加成反应形成的。随后的步骤提供了普通的二烯醇,其经过BF 3 ·Et 2 O介导的Et 3 SiH还原和使用Ru(II)催化剂进行的烯烃闭环复分解(RCM)。最后两个步骤的顺序为使C6和C10a处的立体化学结果多样化提供了一种方法。
Discovery of novel tubulin CBSI <b>(<i>R</i>)-9k</b> from the indanone scaffold for the treatment of colorectal cancer
作者:Zhipeng Huo、Delin Min、Shijie Zhang、Mei-Lin Tang、Xun Sun
DOI:10.1039/d3md00337j
日期:——
Compared with the first line therapy 5-fluorouracil, (R)-9k bound to the colchicine site and showed more potent inhibitory activities against colorectal cancer cells, lower cytotoxicity against normal cells and less cardiotoxicity.
Identification of 3′,4′,5′-trimethoxychalcone analogues as potent inhibitors of Helicobacter pylori-induced inflammation in human gastric epithelial cells
Efforts to identify potent small molecule inhibitors of Helicobacter pylori led to the evaluation of 23 3',4',5'-trimethoxychalcone analogues. Some of the compounds displayed potent antibacterial activity against H. pylori. Three most active and selective compounds 1, 7, and 13 also showed the bactericide activity against the reference as well as multidrug-resistant strains of H. pylori. Additionally, the aforementioned three compounds potentially inhibited the H. pylori adhesion and invasion to human gastric epithelial (AGS) cells. Furthermore, these selective compounds inhibited the H. pylori-induced gastric inflammation by reduced inflammatory mediator's nuclear factor kappa B activation, and the secretion of interleukin-8. (c) 2010 Elsevier Ltd. All rights reserved.
Synthesis of New <i>N</i><sup>1</sup>-Substituted-5-aryl-3-(3,4,5-trimethoxyphenyl)-2-pyrazoline Derivatives as Antitumor Agents Targeting the Colchicine Site on Tubulin
A series of pyrazoline derivatives 2a–e, 3a–e and 4a–e structurally related to combretastatin A4 (CA-4) were synthesized and characterized by spectroscopic means and elemental analyses. In these compounds, the cis double bond of CA-4 was replaced with the pyrazoline ring aiming to enhance the cytotoxic effects displayed by CA-4 and to prevent the cis/trans isomerization that is associated with inactivation of CA-4. The cytotoxic activity of all new compounds was investigated in vitro against MCF-7 and HCT-116 cell lines. The inhibition of tubulin polymerization by the most active compounds 3d, 4a and e was evaluated. The cytotoxicity of 4e was correlated with induction of apoptosis and caspase-3 activation in vitro thus indicating the apoptotic pathway of anticancer effect of these compounds. Furthermore, in vivo evaluation of the synthesized compounds was carried out against Ehrlich’s ascites carcinoma (EAC) solid tumor grown in mice. Compounds 2c, 3a and e showed significant reduction in tumor weight, and about 2–4 fold increase in caspase-3 expression.