A Novel Efficient Solid Acid Nanocatalyst for the Synthesis of 1'-Aryl-2'-(2-oxoindolin-3-yl)spiro[indoline-3,5'-pyrroline]-2,3'-dione Derivatives
Subject Areas :
کبری نیکوفر
1
(استادیار شیمی آلی، گروه شیمی، دانشکده فیزیک و شیمی، دانشگاه الزهرا (س)، تهران، ایران)
زهرا خادمی
2
(کارشناسی ارشد شیمی آلی، گروه شیمی، دانشکده فیزیک و شیمی، دانشگاه الزهرا (س)، تهران، ایران)
شیوا خانی
3
(کارشناسی ارشد شیمی آلی، گروه شیمی، دانشکده فیزیک و شیمی، دانشگاه الزهرا (س)، تهران، ایران)
Keywords: Heterogeneous catalyst, Multi-component reaction, Nanocatalyst, One-pot reaction, Spiro compounds,
Abstract :
Para-toluene sulfonic acid embedded on nano silica )ρ-TSA@nano SiO2( has been synthesized via a simple procedure and characterized by fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), and scanning electron microscopy (SEM) techniques. The synthesized nanocatalyst has been utilized to accelerate the one-pot multicomponent condensation reaction of isatins, anilines, and acetone to obtain the corresponding 1'-aryl-2'-(2-oxoindolin-3-yl)spiro[indoline-3,5'-pyrroline]-2,3'-diones at water media under reflux conditions. Utilization of H2O as available and green solvent, excellent yields of products, short reaction times, avoidance of by-products which could be obtained via Aldol condensation of acetone, easily-handle, inexpensive, non-toxic, and heterogeneous nano acid catalyst are some advantageous of the reported method. The recovery and reusability of the nano catalyst has been examined for four runs without activity loss