Dihydropyrano [2,3-c] pyrazole: Novel in vitro inhibitors of yeast α-glucosidase
摘要:
Inhibition of alpha-glucosidase enzyme activity is a reliable approach towards controlling post-prandial hyperglycemia associated risk factors. During the current study, a series of dihydropyrano[ 2,3-c] pyrazoles (1-35) were synthesized and evaluated for their a-glucosidase inhibitory activity. Compounds 1, 4, 22, 30, and 33 were found to be the potent inhibitors of the yeast alpha-glucosidase enzyme. Mechanistic studies on most potent compounds reveled that 1, 4, and 30 were non-competitive inhibitors (K-i = 9.75 +/- 0.07, 46 +/- 0.0001, and 69.16 +/- 0.01 mu M, respectively), compound 22 is a competitive inhibitor (K-i = 190 +/- 0.016 mu M), while 33 was an uncompetitive inhibitor (K-i = 45 +/- 0.0014 mu M) of the enzyme. Finally, the cytotoxicity of potent compounds (i.e. compounds 1, 4, 22, 30, and 33) was also evaluated against mouse fibroblast 3T3 cell line assay, and no toxicity was observed. This study identifies non-cytotoxic novel inhibitors of alpha-glucosidase enzyme for further investigation as anti-diabetic agents. (C) 2016 Elsevier Inc. All rights reserved.
A new convenient four-component synthesis of 6-amino-2H, 4H-pyrano[2,3-c]pyrazole-5-carbonitriles and one-pot synthesis of 6 ′-amino-5-cyano-1,2-dihydrospiro-[(3H)-indole-3,4 ′-(4 ′H)-pyrano[2,3-c]pyrazol]-2-ones
作者:Yu. M. Litvinov、L. A. Rodinovskaya、A. M. Shestopalov
DOI:10.1007/s11172-009-0328-4
日期:2009.11
A newconvenient method for the synthesis of 6-amino-2H,4H-pyrano[2,3-c]pyrazole-5-carbonitriles, namely, four-component condensation of carbonyl compounds (aromatic aldehydes, heterocyclic ketones), malononitrile, β-keto esters, and hydrazine hydrate in ethanol in the presence of triethylamine as a catalyst, which occurs selectively, is developed. One-pot two-step modification of this method is proposed
Highly functionalized pyranopyrazoles: synthesis, antimicrobial activity, simulation studies and their structure activity relationships (SARs)
作者:Guda Mallikarjuna Reddy、Gundala Sravya、Gutha Yuvaraja、Alexandre Camilo、Grigory V. Zyryanov、Jarem Raul Garcia
DOI:10.1007/s11164-018-3569-8
日期:2018.12
the present work synthesis, simulation, and antimicrobial studies of pyranopyrazole derivatives were discussed. Among the reported compounds, 4b has dominant antimicrobial activity that was due to its higher dipolemoment. Also, this compound has the most hydrophilic nature and low E g value. Besides, compound 4e has the next higher dipolemoment, hydrophilic property and efficient biological activity
摘要 有效的抗菌和抗真菌剂的开发是治疗领域中一项永恒而又不懈的研究。尽管如此,医学研究仍希望找到最好的抗菌剂。为了达到这个目的,在这里,讨论了吡喃并吡唑衍生物的当前工作合成,模拟和抗菌研究。在报告的化合物中,由于其较高的偶极矩, 4b 具有显着的抗菌活性。而且,该化合物具有最亲水的性质和较低的 E g值。此外,化合物 4e 具有更高的偶极矩,亲水性和有效的生物活性。这些结果的基本原理说明,将电子结果与生物学数据进行比较是找到有效药物化合物的更好方法。 图形概要
Synthesis of Pyranopyrazoles under Eco-friendly Approach by Using Acid Catalysis
作者:Guda Mallikarjuna Reddy、Jarem Raul Garcia
DOI:10.1002/jhet.2544
日期:2017.1
Multicomponent synthesis of pyranopyrazole derivatives by using montmorillonite K‐10 as a reusable green acid catalyst under eco‐friendly method in the presence of eco‐friendly solvent leads to novel protocol. Moreover, catalyst could be reused five times for the reaction without noticeable loss of activity. The scope of this path was to develop new synthetic molecules by using green catalysis for further
Design and development of a new functionalized cellulose-based magnetic nanocomposite: preparation, characterization, and catalytic application in the synthesis of diverse pyrano[2,3-c]pyrazole derivatives
作者:Ali Maleki、Vahid Eskandarpour
DOI:10.1007/s13738-019-01610-9
日期:2019.7
for the preparation of a new cellulose-based functionalized magnetic nanocomposite catalyst is described. The structure and morphology of the prepared nanomaterial was characterized by scanning electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction patterns, and Fourier transform infrared spectroscopy analyses. Then, its catalytic activity was investigated in the synthesis of 2,4-dihydropyrano[2
Morpholine triflate promoted one-pot, four-component synthesis of dihydropyrano[2,3-c]pyrazoles
作者:Chen-Feng Zhou、Jian-Jun Li、Wei-Ke Su
DOI:10.1016/j.cclet.2016.05.010
日期:2016.11
Abstract A one-pot, four-component reaction of ethyl acetoacetate, hydrazine hydrate, aldehydes, and malononitrile was discussed using Lewis acid catalyst morpholine triflate (MorT) to afford a series of dihydropyrano[2,3- c ]pyrazoles, which were generally catalyzed by organic alkalis. Moderate to excellent yields, no chromatographic purification, and evasion of environmentally hazardous solvents