Preparation, characterization, and catalysis application of nano-rods zinc oxide in the synthesis of 3-indolyl-3-hydroxy oxindoles in water
作者:Mona Hosseini-Sarvari、Mina Tavakolian
DOI:10.1016/j.apcata.2012.07.009
日期:2012.10
ZnO nano-rods is synthesized successfully by a new method employing Zn(OAc)(2)center dot 2H(2)O. NH3 and polyethylene glycol (PEG, M-w = 2000). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and BET surface area measurement were used to characterize the structure and morphology of the catalyst. Nano-rods ZnO has been found highly effective and recyclable catalyst for synthesis of 3-indolyl-3-hydroxy oxindole derivatives by Friedel-Crafts reaction of indole with isatins in excellent yields, in water. (C) 2012 Elsevier B.V. All rights reserved.
Supramolecular Synthesis of 3-Indolyl-3-hydroxy Oxindoles under Neutral Conditions in Water
[GRAPHICS]Various 3-indolyl-3-hydroxy oxindoles were prepared for the first time by supramolecular catalysis involving the reaction of beta-CD:isatin complexes with indoles under neutral conditions in water. beta-Cyclodextrin can be recovered and reused a number of times without loss of activity.