NNNifty targets: In a straightforward copper‐mediated synthesis of 1,4‐disubstituted and 1,4,5‐trisubstituted 1,2,3‐triazoles, readily available aniline and N‐tosylhydrazone substrates underwent cyclization through CN and NN bond formation (see scheme; Piv=pivaloyl, Ts=p‐toluenesulfonyl). This method enables the preparation of 1,2,3‐triazoles with high efficiency under mild conditions without the
recoverable and reusable heterogeneous catalyst can be used in the click synthesis of 1,2,3-triazoles via a one-pot three-component reaction of boracic acid, terminal alkynes, and sodium azide at roomtemperature in water. FT-IR, XRD, SEM, XPS, TG, and ICP-AES techniques were used to characterize the catalyst. In general, this reaction, with the aid of this new catalyst, afforded the corresponding products
A novel synthetic approach toward 1,4‐disubstituted 1,2,3‐triazoles by CN‐ and NN‐bond formation has been established under transition‐metal‐free conditions. Complete control of the regioselectivity was successfully achieved. Commercially available anilines, ketones, and N‐tosylhydrazine were treated with molecular iodine in one pot to allow the regioselective generation of 1,4‐disubstituted 1,2
A practical and efficient one-pot procedure for the regioselective synthesis of functionalised 1,4-disubstituted 1,2,3-triaz- oles from primary amines and terminal acetylenes has been established utilising the inexpensive, shelf-stablediazotransferreagentimidazole-1-sulfonylazidehydrochloride.
Brönsted acid catalyzed addition of N 1 - p -methyl toluenesulfonyl triazole to olefins for the preparation of N 2 -alkyl 1,2,3-triazoles with high N 2 -selectivity
作者:Jinwei Shi、Lili Zhu、Jian Wen、Zili Chen
DOI:10.1016/s1872-2067(15)61107-x
日期:2016.8
An efficient newmethod has been developed to synthesize N 2 -alkyl 1,2,3-triazole products by toluenesulfonic acid (TsOH) catalyzed addition of N 1 -Ts substituted 1,2,3-triazoles to olefins. The reactions of monosubstituted and unsubstituted triazole substrates with various olefins, including vinyl esters, are explored.
已开发出一种有效的新方法,通过甲苯磺酸 (TsOH) 催化 N 1 -Ts 取代的 1,2,3-三唑与烯烃的加成来合成 N 2 -烷基 1,2,3-三唑产物。探索了单取代和未取代的三唑底物与各种烯烃(包括乙烯基酯)的反应。