Journal
ARABIAN JOURNAL OF CHEMISTRY
Volume 12, Issue 8, Pages 3776-3784Publisher
ELSEVIER
DOI: 10.1016/j.arabjc.2016.01.013
Keywords
MgAl2O4; Oxindoles; Nanocatalyst; Multi-component reaction (MCR)
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Nanocrystalline MgAl2O4 has been synthesized via co-precipitation method and characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques. The synthesized nanocatalyst has been utilized for the one-pot condensation of indoles and isatins to prepare 3-hydroxy-3-indolyl-indolin-2-ones and symmetrical and unsymmetrical 3,3'-bis(indolyl)-indolin-2-ones. The one-pot pseudo three-component condensation of indoles and various aldehydes has also been examined to afford 3,3'-bis(indolyl)methanes. Short reaction times, reusability and recovery of the nanocatalyst, in addition to solvent-free reaction media are some advantages of this eco-friendly procedure. (C) 2019 Published by Elsevier B.V. on behalf of King Saud University.
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