Expeditious synthesis of diverse spiro fused quinoxaline derivatives using magnetically separable core-shell CoFe<sub>2</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
-SO<sub>3</sub>
H nanocatalyst under ultrasonication
作者:Subhro Mandal、Subhenjit Hazra、Soumen Sarkar、Chandan Bodhak、Animesh Pramanik
DOI:10.1002/aoc.4702
日期:2019.4
A magnetically separable core–shell CoFe2O4@SiO2‐SO3H nanocatalyst has been successfully exploited as a heterogeneous acid catalyst in the synthesis of diversely substituted biologically important spiro fused pyrrolo/indolo[1,2‐a]quinoxaline derivatives through the condensation of N‐(2‐aminophenyl)pyrroles/indoles and various cyclic conjugated 1,2‐diones in ethanol under ultrasonic irradiation. Room
的磁性可分离芯-壳的CoFe 2 ö 4 @SiO 2 -SO 3 ħ纳米催化剂已经成功地利用作为非均相酸催化剂在合成多样化取代的生物学上重要的螺稠合的吡咯并/吲哚并[1,2一]喹喔啉衍生物通过N-(2-氨基苯基)吡咯/吲哚与各种环状共轭1,2-二酮在超声波照射下在乙醇中的缩合反应 室温合成,短的反应时间,广泛的底物范围,良好至优异的产物收率以及使用磁性可分离和可回收的纳米催化剂使该方法具有吸引力和实用性。