通过控制γ-环糊精(γ-CDs)和硼团簇的超分子主体-客体组装,以覆盆子状的方式制备了新型的核-壳磁性金纳米复合材料。在这项工作中,基本的硼簇Cs 2 [ closo- B 12 H 12 ]可以在制备高度单分散的Au纳米颗粒以及将Au纳米颗粒固定在γ-CDs@ Fe 3 O 4上起双重作用。表面作为有效的锚点。这种简便而自发的超分子策略可以控制高度稳定的金复合材料的尺寸和组成。此外,获得的AuNPs @ Fe 3 O 4 复合材料具有优异的催化活性和可再循环性,可将硝基芳族化合物选择性还原为相应的苯胺化合物,并且在20 s内即可实现最快的反应,并且在室温下具有较高的转化率和选择性,这比之前在SiO2研究中获得的要好。金属纳米颗粒复合材料作为催化剂。
1,2,3-Triazole derivatives as antitubercular agents: synthesis, biological evaluation and molecular docking study
作者:Mubarak H. Shaikh、Dnyaneshwar D. Subhedar、Laxman Nawale、Dhiman Sarkar、Firoz A. Kalam Khan、Jaiprakash N. Sangshetti、Bapurao B. Shingate
DOI:10.1039/c5md00057b
日期:——
A library of thirty one 1,2,3-triazole derivatives efficiently preparedviaclick chemistry and evaluated for their antitubercular, antioxidant, and cytotoxic activities.
Borderline metal catalysts, Bi(OTf)3 and Fe(OTf)3, were proven to work as dual activators for alkynes and N,O-acetals via σ,π-chelation, which achieved a new carboarylation reaction of alkynylarenes with N,O-acetals.
Cu(I)-Catalyzed Efficient Synthesis of 2′-Triazolo-nucleoside Conjugates
作者:D. Mathur、N. Rana、C. E. Olsen、V. S. Parmar、A. K. Prasad
DOI:10.1002/jhet.2159
日期:2015.5
2′‐azido‐2′‐deoxy‐5‐methyluridine with different alkynes and aryl propargyl ethers in almost quantitative yields. Triazolo‐nucleoside conjugates, which can be evaluated for different biological activity for suitable drug development, were unambiguously identified on the basis of 1H NMR, 13C NMR, IR, and HRMS data analysis. These compounds have been synthesized for the first time and have not been reported
通过Cu(I)催化2'-叠氮基2'-脱氧尿苷和2'-叠氮基2'的缩合反应合成了一个由32个2'-三唑基尿苷和2'-三唑基-5-甲基尿苷组成的小型文库带有不同炔烃和芳基炔丙基醚的脱氧-5甲基尿苷,收率基本定量。在1 H NMR,13 C NMR,IR和HRMS数据分析的基础上,明确鉴定出三唑-核苷共轭物,可以针对不同的生物学活性进行评估,以开发合适的药物。这些化合物是首次合成,并且在早期文献中没有报道。
A Regio- and Diastereoselective Platinum-Catalyzed Tandem [2+1]/[3+2] Cycloaddition Sequence
Platinum complexes bearing phosphinous acids have efficiently promoted a tandem intermolecular sequence of [2+1]/[3+2] cycloaddition reactions. This process gave access to novel tricyclic systems and the cascade reactions were regio‐ and diastereoselective (see scheme; Cy=cyclohexyl). The [3+2] cycloaddition reaction was investigated further and two different alkyne partners were used.
Semi-Synthesis and Biological Evaluation of 1,2,3-Triazole-Based Podophyllotoxin Congeners as Potent Antitumor Agents Inducing Apoptosis in HepG2 Cells
topoisomerase II revealed perfect docking of four congeners in the active site. Furthermore, the podophyllotoxincongeners 10, 11, 12, and 13 inducedcell cycle arrest of HepG2cells at the G2/M phase in a concentration‐dependent manner, assessed by flow cytometric analysis, highlighting that they exert their antitumor activity via HepG2cellapoptosis.