Synthesis of 3-ethynyl-3-hydroxy-2-oxindoles and 3-hydroxy-3-(indol-3-yl) indolin-2-ones using CuWO4 nanoparticles as recyclable heterogeneous catalyst in aqueous medium
作者:Banoth Paplal、Kota Sathish、Sakkani Nagaraju、Dhurke Kashinath
DOI:10.1016/j.catcom.2019.105874
日期:2020.2
acetylenes (spC-H activation) and selective synthesis of 3-hydroxy-3-(indol-3-yl) indolin-2-ones and 3,3′-bis(indolyl)indolin-2-ones (via Friedel-Crafts alkylation reaction) is reported in presence of CuWO4 (10 mol%) nanoparticles in aqueous medium. The catalyst was regenerated and reused up to 6 cycles without losing catalytic activity. This is the first report for the spC-H activation using CuWO4
一种直接活化苯基乙炔的简单方法(sp C-H活化)和3-羟基-3-(吲哚-3-基)吲哚-2-酮和3,3'-双(吲哚基)吲哚-2的选择性合成据报道,在水性介质中存在CuWO 4(10 mol%)纳米粒子的情况下,-(通过Friedel-Crafts烷基化反应)。再生催化剂并重复使用多达6个循环,而不会失去催化活性。这是使用CuWO 4活化sp C-H的第一份报告,并且对于这两种反应均具有广泛的底物范围。