Base-mediated reaction of vinyl bromides with aryl azides: one-pot synthesis of 1,5-disubstituted 1,2,3-triazoles
作者:Luyong Wu、Yuxue Chen、Jianheng Luo、Qi Sun、Mingsheng Peng、Qiang Lin
DOI:10.1016/j.tetlet.2014.03.029
日期:2014.7
been investigated in the process. A variety of 1,5-disubstituted triazoles were prepared in low to good yields. Further studies reveal that the corresponding alkynes were produced as intermediates via elimination reaction. Under the same reaction conditions, the reactions of alkyl alkynes with phenyl azide would give 1,5-disubstituted1,2,3-triazoles.
A Metal-Free Multicomponent Cascade Reaction for the Regiospecific Synthesis of 1,5-Disubstituted 1,2,3-Triazoles
作者:Guolin Cheng、Xiaobao Zeng、Jinhai Shen、Xuesong Wang、Xiuling Cui
DOI:10.1002/anie.201307499
日期:2013.12.9
About specifics: A method for the regiospecific synthesis of the title compounds through an unprecedented Michael addition/deacylative diazo transfer/cyclization sequence has been established. The simple and practical method can be used for the modification of primary amines including chiral α‐amines. The process involves the formation three covalent bonds and the cleavage of two covalent bonds (see
The first example of rare earth metal-catalyzed cycloaddition of terminal alkynes to azides resulting in the formation of 1,5-disubstituted 1,2,3-triazoles is described. Preliminary studies revealed that the present cycloaddition shows unprecedented mechanistic features involving a tandem anionic cascade cyclization and anti-addition across the CC triple bond.
作者:James T. Fletcher、Jill M. Sobczyk、Sarah C. Gwazdacz、Aaron J. Blanck
DOI:10.1016/j.bmcl.2018.09.011
日期:2018.11
A series of 1,3,4-trisubstituted-1,2,3-triazolium bromide salts were prepared by efficient two-step sequences of azide-alkyne cycloaddition and benzylic substitution. The antimicrobial activity of each triazolium salt and correlating triazole precursor was evaluated using a minimum inhibitory concentration (MIC) assay. MIC activities as low as 1 µM against Gram-positive bacteria, 8 µM against Gram-negative
Ruthenium-Catalyzed Cycloaddition of Aryl Azides and Alkynes
作者:Lars Kyhn Rasmussen、Brant C. Boren、Valery V. Fokin
DOI:10.1021/ol701912s
日期:2007.12.1
The formation of 1,5-disubstituted 1,2,3-triazoles from arylazides and alkynes was readily accomplished using [Cp*RuCl]4 catalyst in dimethylformamide. It was also demonstrated that the reaction provided higher yields, cleaner product, and shorter reaction times when carried out under microwave irradiation.