[4 + 1] Annulation of in situ generated azoalkenes with amines: A powerful approach to access 1-substituted 1,2,3-triazoles
作者:Hongwei Wang、Yongquan Ning、Paramasivam Sivaguru、Giuseppe Zanoni、Xihe Bi
DOI:10.1016/j.cclet.2021.09.008
日期:2022.3
methods for their preparation mainly rely on thermal [3 + 2] cycloaddition of potentially dangerous acetylene and azides. Here we report a base-mediated [4 + 1] annulation of azoalkenes generated in situ from readily available difluoroacetaldehyde N-tosylhydrazones (DFHZ-Ts) with amines under relatively mild conditions. This azide- and acetylene-free strategy provides facile access to diverse 1-substituted
Easy One-Pot Synthesis of 1-Monosubstituted Aliphatic 1,2,3-Triazoles from Aliphatic Halides, Sodium Azide and Propiolic Acid by a Click Cycloaddition/Decarboxylation Process
作者:Zhongkui Zhang、Chunxiang Kuang
DOI:10.1002/cjoc.201300155
日期:2013.8
1‐Monosubstituted aliphatic 1,2,3‐triazoles were synthesized by a one‐pot reaction fromaliphatichalides (Cl and Br), sodiumazide and propiolicacid. The yields ranged from moderate to good. The reaction was easily carried out in DMF with Cs2CO3 at 100°C by copper‐catalyzed clickcycloaddition/decarboxylation.
通过单锅反应由脂肪族卤化物(Cl和Br),叠氮化钠和丙酸合成1-单取代的脂肪族1,2,3-三唑。产量从中等到良好。通过铜催化的点击环加成/脱羧反应,可以轻松地在100°C下于Cs 2 CO 3的DMF中进行反应。
Efficient synthesis of deuterated 1,2,3-triazoles
作者:Zsombor Gonda、Krisztián Lőrincz、Zoltán Novák
DOI:10.1016/j.tetlet.2010.09.097
日期:2010.12
A wide variety of 1-monosubstituted 1,2,3-triazoles were synthesized efficiently via a copper-catalyzed click-reaction between azides and acetylene gas, generated in situ from CaC2 with the addition of H2O or D2O. (C) 2010 Elsevier Ltd. All rights reserved.
Verfahren zur Herstellung von Phenyläthyltriazolen
申请人:CIBA-GEIGY AG
公开号:EP0063099B1
公开(公告)日:1985-11-27
A Convenient Synthesis of 1-Substituted
1,2,3-Triazoles via CuI/Et<sub>3</sub>N Catalyzed ‘Click
Chemistry’ from Azides and Acetylene Gas
Copper(I)-catalyzed ‘click chemistry’ using acetylene gas was successfully explored under mild conditions. 1-Substituted-1,2,3-triazoles were conveniently synthesized from the corresponding aromatic and aliphatic azides.