Synthesis of N-(oxyran-2-ylmethyl)triazoles and -tetrazoles
摘要:
The alkylation of 5-phenyl-1H-tetrazole and 4-nitro-2H-1,2,3-triazole with 1-chloro-2,3-epoxypropane and cycloaddition of 1-azido-3-chloropropan-2-ol to acetylenic dipolarophiles gave the corresponding N-(3-chloro-2-hydroxypropyl)azoles as intermediate products in the synthesis of N-(oxiran-2-ylmethyl)azoles.
2-Azidoalcohols derived in situ from epoxides and sodium azide undergo smooth coupling with alkynes under neutral conditions by means of ‘click reactions’ to furnish β-hydroxytriazoles in excellent yields and with high regioselectivity. This reaction proceeds smoothly in water at room temperature without the need for acid catalysis.
A concise and simple click reaction catalyzed by immobilized Cu(I) in an ionic liquid leading to the synthesis of β-hydroxy triazoles
作者:Nasseb Singh
DOI:10.1016/j.crci.2015.07.006
日期:2015.12
Résumé This study describes an ecocompatible, concise, and practically reliable approach for the regioselective synthesis of β-hydroxy triazoles via Huisgen's click coupling reaction among varied epoxides, NaN3, and suitable acetylenes catalysed by immobilized Cu(I) in ionic liquid (IL). This one-pot, atom-economic, efficient, and highly regioselective green protocol ensures higher yield of β-hydroxy triazole scaffolds (85–95%). To make the process ecofriendly, this study emphasizes on the catalyst immobilization technique along with its possible recycling that gave a high reaction yield in up to three runs. The structures of all synthesized compounds have been characterized by comparing 1H nuclear magnetic resonance (NMR), 13C NMR, and mass spectroscopic data with those reported in the literature.
CoFe<sub>2</sub>O<sub>4</sub>/Cu(OH)<sub>2</sub> magnetic nanocomposite: an efficient and reusable heterogeneous catalyst for one-pot synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles from epoxides
作者:Ronak Eisavi、Asmar Karimi
DOI:10.1039/c9ra06038c
日期:——
separable CoFe2O4/Cu(OH)2 nanocomposite was prepared and characterized by various techniques such as FESEM, EDS, TEM, XRD, VSM and FT-IR. This novel composite was used as a heterogeneous catalyst for the regioselective synthesis of β-hydroxy-1,4-disubstituted-1,2,3-triazoles from sodium azide, terminal alkynes and structurally different epoxides in water at 60 °C. The formation of the product proceeds
制备了一种可磁分离的CoFe 2 O 4 /Cu(OH) 2纳米复合材料,并通过FESEM、EDS、TEM、XRD、VSM和FT-IR等多种技术对其进行了表征。这种新型复合材料被用作非均相催化剂,用于在 60 °C 的水中从叠氮化钠、末端炔烃和结构不同的环氧化物区域选择性合成 β-羟基-1,4-二取代-1,2,3-三唑。产品的形成通过一种涉及原位的机制在一个锅中进行生成有机叠氮化物中间体,然后与炔烃组分快速闭环。简单的程序、短的反应时间、完美的区域选择性、高产品收率以及使用良性溶剂和无毒催化剂是该协议的显着优势之一。此外,催化剂很容易使用外部磁体分离并重复使用多次,而不会显着损失催化活性或磁性。
A Simple, General Method for the Synthesis of 1-Chloro-3-(1,2,3-triazol-1-yl)-propan-2-ol Derivatives and Computational Analysis Thereof
作者:Flor M. Escandón-Mancilla、Joanatan M. Bautista-Renedo、David Corona-Becerril、Horacio Reyes、M. V. Basavanag Unnamatla、Marco Antonio García-Eleno、Nelly González-Rivas、Erick Cuevas-Yañez
DOI:10.1080/00304948.2021.1962195
日期:2021.11.2
(2021). A Simple, GeneralMethod for the Synthesis of 1-Chloro-3-(1,2,3-triazol-1-yl)-propan-2-ol Derivatives and Computational Analysis Thereof. Organic Preparations and Procedures International: Vol. 53, No. 6, pp. 518-527.
Inhibiting a dynamic viral protease by targeting a non-catalytic cysteine
作者:Kaitlin R. Hulce、Priyadarshini Jaishankar、Gregory M. Lee、Markus-Frederik Bohn、Emily J. Connelly、Kristin Wucherer、Chayanid Ongpipattanakul、Regan F. Volk、Shih-Wei Chuo、Michelle R. Arkin、Adam R. Renslo、Charles S. Craik
DOI:10.1016/j.chembiol.2022.03.007
日期:2022.5
(HHV) infection by covalently inactivating the HHV maturational protease via a conserved, non-catalytic cysteine (C161). Using human cytomegalovirus protease (HCMV Pr) as a model, we screened a library of disulfides to identify molecules that tether to C161 and inhibit proteolysis, then elaborated hits into irreversible HCMV Pr inhibitors that exhibit broad-spectrum inhibition of other HHV Pr homologs