Synthesis and anticancer activity of heteroaromatic linked 4β-amido podophyllotoxins as apoptotic inducing agents
作者:Ahmed Kamal、Jaki R. Tamboli、M.V.P.S. Vishnuvardhan、S.F. Adil、V. Lakshma Nayak、S. Ramakrishna
DOI:10.1016/j.bmcl.2012.10.099
日期:2013.1
17a–i and 18a–d) were synthesized and evaluated for anticancer activity against five human cancer cell lines. Among the series, one of the compound 17g showed significant antiproliferative activity in A549 (lung cancer) cell line. Flow cytometric analysis showed that 17g arrested the cell cycle in the G2/M phase leading to caspase-3 dependent apoptotic cell death. Further, Hoechst 33258 staining and DNA
Design, Synthesis, Biological Evaluation and In Silico Studies of Pyrazole-Based NH2-Acyl Oseltamivir Analogues as Potent Neuraminidase Inhibitors
作者:Jiqing Ye、Lin Lin、Jinyi Xu、Paul Kay-sheung Chan、Xiao Yang、Cong Ma
DOI:10.3390/ph14040371
日期:——
Oseltamivir represents one of the most successful neuraminidase (NA) inhibitors in the current anti-influenza therapy. The 150-cavity of NA was identified as an additional binding pocket, and novel NA inhibitors have been designed to occupy the 150-cavity based on the structure information of oseltamivir carboxylate (OC) in complex with NA. In this study, a series of C-5-NH2-acyl derivatives of OC
奥司他韦是当前抗流感治疗中最成功的神经氨酸酶(NA)抑制剂之一。 NA 的 150 个空腔被确定为一个额外的结合袋,并且根据羧酸奥司他韦 ( OC ) 与 NA 复合物的结构信息,设计了新型 NA 抑制剂来占据 150 个空腔。本研究合成了一系列含有吡唑部分的OC的C-5-NH 2 -酰基衍生物。几种衍生物对 NA 表现出显着的抑制活性。此外,计算机ADME评估表明,该衍生物具有类似药物的特性,比OC具有更高的口服吸收率和更大的细胞渗透性。此外,分子对接研究表明,衍生物与 NA 酶活性位点和 150 腔相互作用,正如预期的那样。研究结果为OC的进一步结构优化提供了有用的信息。
1,3-Dipolar Cycloaddition of Diazophosphonates with Methyl(Ethyl) Acrylate for the Synthesis of 5-Arylpyrazole-3-carboxylates
作者:Igor D. Titanyuk、Nikolay A. Zinovyev、Irina P. Beletskaya
DOI:10.1055/a-2338-8631
日期:2024.9
with tosyl azide (TsN3) in the presence of potassium tert-butoxide (KOtBu) to afford diazophosphonates in yields up to 93% (generally 70–80%). Aryldiazophosponates were successfully explored for the synthesis of 5-aryl-substituted pyrazol-3-carboxylates in one pot by the 1,3-dipolar cycloaddition with alkyl acrylates followed by NaH treatment. The second stage led to elimination of the diethoxylphosphoryl
Here we report the first example of iridium-catalyzed asymmetric N-allylation of pyrazoles with dienyl allylic alcohols under mild conditions with broad functional group tolerance, exhibiting excellent N1/C3-site selectivities and enantioselectivities (up to >99% ee). In addition to pyrazoles, other nucleophiles including benzotriazole, triazole, and pyrazole precursors (aryl vinyldiazos) are also