Synthesis of 2-aryl-2H,4H-imidazo[4,5-d][1,2,3]triazoles from triethyl N-(1-ethyl-2-methyl-4-nitro-1H-imidazol-5-yl)phosphorimidate by reaction with aryl isocyanates
摘要:
报告了一系列 2-芳基-2H,4H-咪唑并[4,5-d][1,2,3]三唑的合成。这些化合物是通过 N-(1-乙基-2-甲基-4-硝基-1H-咪唑-5-基)膦酰亚胺三乙酯与芳基异氰酸酯反应得到的,收率中等至良好。报告了 N-(1-乙基-2-甲基-4-硝基-1H-咪唑-5-基)膦酰亚胺三乙酯和 2-(4-三氟甲基苯基)取代的 2H,4H-咪唑并[4,5-d][1,2,3]三唑的 X 射线晶体结构。光谱证明了反应机理中提出的碳化二亚胺中间体。
Design and the synthesis of
<scp>1‐heteroaryl</scp>
‐1,2,3‐triazoles connected to coumarins via ether linker
作者:Muthipeedika Nibin Joy、Nikolai Beliaev、Tetyana V. Beryozkina、Vasiliy A. Bakulev
DOI:10.1002/jhet.4025
日期:2020.8
In this paper, we report an efficient and versatile methodology for the synthesis of a series of novel heteroaryl‐1,2,3‐triazoles connected to 4‐methylcoumarin (4‐methyl‐2H‐chromen‐2‐one) via oxymethylene linker. The desired molecules were accessed by both two‐step synthesis and the one‐pot copper catalyzed cycloaddition reaction of heteroaromatic azides with coumarin containing acetylenes. The developed
Diastereoselective synthesis of 1,2,3-triazolines fused with pentane and dihydropyran rings
作者:Nikolay A. Belyaev、Tetyana V. Beryozkina、Vasiliy A. Bakulev、Oleg S. Eltsov、Gert Lubec
DOI:10.1007/s10593-018-2382-z
日期:2018.10
As a result of studying the reactions of 5-azido-1-methyl-4-nitroimidazole and 2,4,5-trimethoxy-1,3,5-triazine with endocyclic enamines, a diastereoselective method was developed for the synthesis of 1-hetarylcycloalkano[1,2,3]triazolines with cis configuration of substituents at the bridgehead carbon atoms. The structures of the obtained reaction products were studied by methods of NMR spectroscopy
A catalyst and additive-free three-component reaction of highly electrophilic azides with cyclic ketones and cycloaliphatic amines. Synthesis of novel N-heteroaryl amidines
Highly electrophilic 5-azido-1-methyl-4-nitro-1H-imidazole and sulfonyl azides were demonstrated to react with alicyclic amines and cyclic ketones in the absence of any catalyst or additive to afford novel N-(4-nitroimidazol-5-yl)- or N-sulfonylamidines respectively. Based on single crystal X-ray analysis, a revision of the previously reported data of Gao and co-workers on the direction of the reaction
Design and synthesis of imidazoles linearly connected to carbocyclic and heterocyclic rings<i>via</i>a 1,2,3-triazole linker. Reactivity of β-azolyl enamines towards heteroaromatic azides
作者:Nikolai A. Beliaev、Marsel Z. Shafikov、Ilya V. Efimov、Tetyana V. Beryozkina、Gert Lubec、Wim Dehaen、Vasiliy A. Bakulev
DOI:10.1039/c7nj04243d
日期:——
on the basis of DFT calculations with a mPW1K density functional. The formation of various products in the reaction of imidazolyl azides with enamines was rationalized by different transformation pathways of a common 1,2,3-triazoline intermediate. According to the calculations, the two transformation paths, that are different from the path leading to aromatic 1,2,3-triazoles, occur by a stepwise mechanism
A facile access for the synthesis of 1-hetero(aryl)-1,2,3-triazoles linked to equol under mild conditions
作者:Muthipeedika Nibin Joy、Nikolai Beliaev、Tetyana V. Beryozkina、Vasiliy A. Bakulev
DOI:10.1080/00397911.2020.1792932
日期:2020.10.17
Abstract We herein report a convenient methodology for the synthesis of 1-hetero(aryl)-1,2,3-triazoles linked with equol by utilizing copper-catalyzed azide-alkynecycloaddition reaction under exceptionally mildconditions. The salient features of this developed protocol include: easy isolation process, good to excellent yield of the products and appendage diversity of heteroaryl triazoles. Graphical