作者:Djenisa H. A. Rocha、Diana C. G. A. Pinto、Artur M. S. Silva
DOI:10.1007/s00706-019-02463-x
日期:2019.8
catalyzed Sonogashiracross-couplingreaction of aroyl chlorides with aryl acetylenes, and 1,3-dipolar cycloaddition of the 1,3-diarylprop-2-yn-1-ones with sodium azide under catalyst free conditions achieved the synthesis of aryl(4-aryl-1H-1,2,3-triazol-5-yl)methanones in moderate-to-good chemical yields (30–90%). The procedures allowed the synthesis of 4,5-disubstituted-1H-1,2,3-triazol scaffolds containing
摘要分两步进行,在无催化剂的条件下,钯催化了芳酰氯与芳基乙炔的Sonogashira交叉偶联反应,以及1,3,2-二芳基丙-2-yn-1-one与叠氮化钠的1,3-偶极环加成反应合成芳基(4-芳基-1 H -1,2,3-三唑-5-基)甲烷酮,化学收率中等至良好(30-90%)。该程序允许合成含有电子中性,吸电子基团或供体基团的4,5-二取代的-1 H -1,2,3-三唑支架。 图形摘要
An Atom-Economic Method for 1,2,3-Triazole Derivatives via Oxidative [3 + 2] Cycloaddition Harnessing the Power of Electrochemical Oxidation and Click Chemistry
作者:Manas Bandyopadhyay、Sayan Bhadra、Swastik Pathak、Anila M. Menon、Deepak Chopra、Snehangshu Patra、Jorge Escorihuela、Souradeep De、Debabani Ganguly、Suman Bhadra、Mrinal K. Bera
DOI:10.1021/acs.joc.3c01836
日期:2023.11.17
the reagentless synthesis of 4,5-disubstituted triazole derivatives employing secondary propargyl alcohol as C-3 synthon and sodium azide as cycloaddition counterpart. The reaction was conducted at room temperature in an undivided cell with a constant current using a pencil graphite (C) anode and stainless-steel cathode in a MeCN solvent system. The proposed reaction mechanism was convincingly established
Facile One-Pot Synthesis of 4,5-Disubstituted 1,2,3-(NH)-Triazoles through Sonogashira Coupling/1,3-Dipolar Cycloaddition of Acid Chlorides, Terminal Acetylenes, and Sodium Azide
A novel and efficient way of synthesizing 4,5-disubstituted-1,2,3-(NH)-triazoles through palladium-catalyzed and ultrasonic promoted Sonogashira coupling/1,3-dipolar cycloaddition of acid chlorides, terminal acetylenes, and sodium azide in one pot is developed. The reaction scope is quite general, and the methodology can produce excellent yields. The regioselective 1,4,5-trisubstituted-1,2,3-(NH)-triazoles can be made easily from 4,5-disubstituted-1,2,3-(NH)-triazoles.