Regioselective synthesis of functionalized 1,2,3-triazoles via oxidative [3+2]-cycloaddition using Zn(OAc)2 - tBuOOH or ZnO nanoparticle as catalyst system in aqueous medium
作者:Banoth Paplal、Sakkani Nagaraju、Balasubramanian Sridhar、Dhurke Kashinath
DOI:10.1016/j.catcom.2017.05.006
日期:2017.8
The regioselective synthesis of functionalized pyrazole˗1,2,3-triazoles is reported via oxidative [3 + 2]-cycloaddition reactions of azides with β-nitrostyrenes and chalcone derivatives using Zn(OAc)2 - tBuOOH or ZnO nanoparticles as catalyst system in aqueous medium. The catalyst dependent product selectivity was observed with β-nitrostyrenes to give the triazoles with and without -NO2 group Zn(OAc)2
官能pyrazole˗1,2,3三唑的区域选择性合成报道通过氧化[3 + 2]使用的Zn(OAc)β-硝基苯乙烯和查耳酮衍生物的叠氮化物-环反应2 -吨BuOOH或ZnO纳米颗粒作为催化剂体系在水性介质中。用β-硝基苯乙烯观察到催化剂依赖性的产物选择性,得到具有和不具有-NO 2基团Zn(OAc)2和ZnO纳米颗粒的三唑。查耳酮选择性地使三唑作为唯一产物具有良好的区域选择性。所得产物分别进一步转化为磺酰胺和恶唑。