Some Aspects of the Azide-Alkyne 1,3-Dipolar Cycloaddition Reaction
作者:N. T. Pokhodylo、M. A. Tupychak、O. Ya. Shyyka、M. D. Obushak
DOI:10.1134/s1070428019090082
日期:2019.9
Some peculiar features of two most commonly used catalytic systems (Cul and CuSOVsodium ascorbate) controlling the regioselectivity of 1,3-dipolar cycloaddition of azides to terminal alkynes have been studied. Their potentialities, main disadvantages, and limitations have been demonstrated by a number of examples, including reactions of low-molecular-weight azides and alkynes containing heterocyclic
Pyridinyl-triazole ligand systems for highly efficient CuI-catalyzed azide-alkyne cycloaddition
作者:Lei Zheng、Ye Wang、Xianggao Meng、Yunfeng Chen
DOI:10.1016/j.catcom.2020.106165
日期:2021.1
N1/N2-substituted 2-(NH-1,2,3-triazol-4-yl)pyridines) were found to be superior ligands for CuI-catalyzed azide-alkyne cycloaddition (CuAAC) reactions. Low catalyst loadings, short reaction times, facile catalyst recyclability, ambient temperature, and open-flask conditions made this catalytic system very practical. The iodide anions could form iodine bridges to construct stable dinuclear Cu(I) complexes with these
吡啶基-三唑配体系统(包括N 2 -2-吡啶基1,2,3-三唑和N 1 / N 2取代的2-(NH(1,2,3-三唑-4-基)吡啶被发现是CuI催化的叠氮化物-炔烃环加成(CuAAC)反应的优良配体。催化剂负载量低,反应时间短,催化剂易于回收利用,环境温度和开瓶条件使该催化系统非常实用。碘化物阴离子可形成碘桥,与这些配体一起构建稳定的双核Cu(I)配合物,这是实现高催化活性的关键。虽然CuBr和CuCl不适合该配体系统,因为Br和Cl原子的尺寸不合适,无法形成相应的双核Cu(I)配合物。
Synthesis and In Vitro Cytotoxicity and Antibacterial Activity of Novel 1,2,3-Triazol-5-yl-Phosphonates
作者:Anna Tripolszky、Emese Tóth、Pál Tamás Szabó、László Hackler、Beáta Kari、László G. Puskás、Erika Bálint
DOI:10.3390/molecules25112643
日期:——
confirmed the large scope and the functional group tolerance. The in vitro cytotoxicity on different cell lines and the antibacterial activity of the synthesized 1,2,3-triazol-5-yl-phosphonates was explored. According to the IC50 values determined, only modest antibacterial effect was detected, while some derivatives showed moderate activity against human promyelocytic leukemia HL-60 cells.
Synthesis of (1,2,3-triazol-4-yl)methyl Phosphinates and (1,2,3-Triazol-4-yl)methyl Phosphates by Copper-Catalyzed Azide-Alkyne Cycloaddition
作者:Anna Tripolszky、Krisztina Németh、Pál Tamás Szabó、Erika Bálint
DOI:10.3390/molecules24112085
日期:——
An efficient and practical method was developed for the synthesis of new (1,2,3-triazol-4-yl)methyl phosphinates and (1,2,3-triazol-4-yl)methyl phosphates by the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) of organic azides and prop-2-ynyl phosphinate or prop-2-ynyl phosphate. The synthesis of (1-benzyl-1H-1,2,3-triazol-4-yl)methyl diphenylphosphinate was optimized with respect to the reaction
A Facile Preparation of Alkyl Azides from Alkyl Bromides and Sodium Azide Using 18-Crown-6 Ether Doped Clay
作者:Rajender S. Varma、Kannan P. Naicker、Jason Aschberger
DOI:10.1080/00397919908086450
日期:1999.8
Abstract A high yield synthesis of alkyl azides is described from readily accessible alkylbromides and sodium azide using a recyclable phase transfer catalyst, 18-crown-6 ether impregnated clay.