A facile ultrasound-assisted synthesis of methyl 2,3-<i>O</i>-isopropylidene-β-D-ribofuranoside from D-ribose and its use to prepare new 1,2,3-triazole glycoconjugates
作者:Tereza Cristina Santos Evangelista、Gabriel Alves Souto de Aquino、Marcio Roberto H. Donza、Rafael Lisboa Leitão、Victor Salarolli de Carvalho、Carlos Roland Kaiser、Sabrina Baptista Ferreira
DOI:10.1080/07328303.2021.1990942
日期:2021.6.13
into its 2,3-O-isopropylidene derivative using ultrasonic irradiation is described. The ultrasound proved to be an excellent alternative as the energy source for the reaction. Different reaction times were investigated, and shorter reaction times and high yield were achieved without the need for purification of the acetonide. The compound was then applied as the starting material in the synthesis of
摘要 描述了使用超声辐射将D-核糖转化为其 2,3- O-异亚丙基衍生物。事实证明,超声波作为反应的能源是一种极好的替代方法。研究了不同的反应时间,在不需要纯化丙酮化物的情况下实现了更短的反应时间和高产率。然后将该化合物用作合成 23 种以不同方式连接在一起的 1,2,3-三唑新糖缀合物的起始材料。合成的化合物通过FTIR、1 H NMR、13 C NMR和HRMS技术表征。
Synthesis, Biological Activity, and Molecular Modeling Studies of 1<i>H</i>-1,2,3-Triazole Derivatives of Carbohydrates as α-Glucosidases Inhibitors
作者:Sabrina B. Ferreira、Ana C. R. Sodero、Mariana F. C. Cardoso、Emerson S. Lima、Carlos R. Kaiser、Floriano P. Silva、Vitor F. Ferreira
DOI:10.1021/jm901265h
日期:2010.3.25
A class of drugs in use for treating type II diabetes mellitus (T2D), typified by the pseudotetrasaccharide acarbose, act by inhibiting the a-glucosidase activity present in pancreatic secretions and in the brush border of the small intestine. Herein, we report the synthesis of a series of 4-substituted 1,2,3-triazoles conjugated with sugars, including D-xylose, D-galactose, D-allose, and D-ribose. Compounds were screened for alpha-glucosidase inhibitory activity using yeast maltase (MAL12) as a model enzyme. Methyl-2,3-O-isopropylidene-beta-D-riboluranosides, such as the 4-(1-cyclohexenyl)-1,2,3-triazole derivative, were among the most active compounds, showing up to 25-fold higher inhibitory potency than the complex oligosaccharide acarbose. Docking studies on a MAL12 homology model disclosed a binding mode consistent with a transition-state-mimicking mechanism. Finally, the actual pharmacological potential of this triazole series was demonstrated by the reduction of postprandial blood glucose levels in normal rats. These compounds could represent new chemical scaffolds for developing novel drugs against T2D.
Preparation and reactions of sugar azides with alkynes: synthesis of sugar triazoles as antitubercular agents
5-Azido-5-deoxy-xylo-, ribo-, and arabinofuranoses were prepared by the reaction of the respective 5-O-(methanesulfonyl) or p-toluenesulfonyl derivatives with NaN3 in DMF. The intermediate 5-azido-5-deoxy glycofuranoses on 1,3-cycloaddition with different alkynes in the presence Of CUSO4 and sodium ascorbate gave the corresponding sugar triazoles in very good yields. The synthesized sugar triazoles were evaluated for their antitubercular activity against Mycobacterium tuberculosis H37Rv, where one of the compounds displayed mild antitubercular activity in vitro with MIC 12.5 mu g/mL. (c) 2008 Elsevier Ltd. All rights reserved.
Cycloaddition of Acetylenes with 5-Azido-5-deoxy-D-aldopentose Derivatives: Synthesis of Triazole Reversed Nucleoside Analogs