Copper-Catalyzed Synthesis of 4-Aryl-1H-1,2,3-triazoles from 1,1-Dibromoalkenes and Sodium Azide
作者:Xiaokun Wang、Chunxiang Kuang、Qing Yang
DOI:10.1002/ejoc.201101204
日期:2012.1
A new methodology for the Cu-catalyzed synthesis of 1H-1,2,3-triazoles from1,1-dibromoalkenes and sodiumazide is presented. Aryl dibromoolefins were efficiently converted into the corresponding 1,2,3-triazoles. A comprehensive number of functional groups were compatible with this reaction. 1,2,3-Triazoles were obtained in moderate to excellent yields.
tetrazoles, triazoles, and imidazolines. The magnetic silica sphere grafted sulfonic acid (MSS-SO3H) is suitable for the synthesis of 1,2,3-triazole via the cycloaddition of nitroalkene with NaN3, whereas the zinc-modified silica sphere catalyst (MSS-SO3Zn) is more suitable for the synthesis of tetrazoles. The MSS-SO3Zn catalyst also works well for the synthesis of 2-substituted imidazoline via the condensation
Diamine-mediated N<sup>2</sup>-selective β-selenoalkylation of triazoles with alkenes
作者:Li-Li Zhu、Lifang Tian、Bin Cai、Guanglu Liu、Hui Zhang、Yahui Wang
DOI:10.1039/d0cc00601g
日期:——
A N2-selective β-selenoalkylation of 1,2,3-triazoles with alkenes mediated by diamines has been developed. The reaction proceeds presumably via the interaction of diamines with both the triazole moiety and selenium/alkene complex to construct a U-shaped reaction intermediate. This activation mode will block the N1 position on triazoles and thus favor the N2-selective selenoamination. This stereospecific
A one‐pot three‐component reaction of aldehydes, nitroalkanes and NaN3 for the synthesis of NH‐1,2,3‐triazoles has been developed. The reaction provides a safe, efficient and step‐economic approach for the synthesis of various NH‐1,2,3‐triazoles in good to excellent yields.
Copper(I) Iodide-Catalyzed Synthesis of 4-Aryl-1H-1,2,3-triazoles from anti-3-Aryl-2,3-dibromopropanoic Acids and Sodium Azide
作者:Chunxiang Kuang、Yubo Jiang、Qing Yang
DOI:10.1055/s-0030-1258312
日期:2010.12
4-Aryl-1H-1,2,3-triazoles were synthesized from anti-3-aryl-2,3-dibromopropanoic acids and sodiumazide by using inexpensive copper(I) iodide as the catalyst in dimethyl sulfoxide. cyclizations - catalysis - heterocycles - azides - triazoles