Facile one-pot three-component synthesis of diverse 2,3-disubstituted isoindolin-1-ones using ZrO<sub>2</sub> nanoparticles as a reusable dual acid–base solid support under solvent-free conditions
作者:Kamalesh Debnath、Sayan Mukherjee、Chandan Bodhak、Animesh Pramanik
DOI:10.1039/c6ra00870d
日期:——
A facile one-pot three-component protocol for the synthesis of a series of multi-functionalized 2,3-disubstituted isoindolin-1-ones has been developed using ZrO2 nanoparticles as a dual acid–base solid support under solvent-free conditions. The surface of the ZrO2 nanoparticles, which is embedded with active hydroxyl groups, oxyanions and Zr4+ ions, efficiently catalyses the condensation of 2-carboxybenzaldehyde
使用ZrO 2纳米颗粒作为无溶剂条件下的双酸碱固相载体,已经开发了一种简便的一锅三组分规程,用于合成一系列多官能化的2,3-二取代异吲哚啉-1-酮。ZrO 2纳米颗粒的表面嵌入了活性羟基,氧阴离子和Zr 4+离子,可有效催化2-羧基苯甲醛,脂肪族胺与亲核试剂的缩合(烯胺/ 6-氨基1,3-二甲基尿嘧啶/ 1 ,3-环己二酮/吲哚)产生2,3-二取代的异吲哚啉-1-酮。操作简单,减少反应时间和温度,消除溶剂,产品产率高,基材范围更广,ZrO 2的利用 作为固体载体的纳米颗粒及其在重复应用后几乎没有减弱的催化活性是本方法的关键特征。