A green one-pot three-component synthesis of spirooxindoles under conventional heating conditions or microwave irradiation by using Fe3O4@SiO2-imid-PMAn magnetic porous nanospheres as a recyclable catalyst
作者:Mohsen Esmaeilpour、Jaber Javidi、Masoumeh Divar
DOI:10.1016/j.jmmm.2016.09.020
日期:2017.2
Abstract An efficient, green and environmentally procedure for the synthesis of spirooxindole derivatives has been developed by a one-pot three-component reaction of isatin derivatives, activated methylene, and 1,3-dicarbonyl compounds in the presence of Fe3O4@SiO2-imid-PMAn magnetic nanocatalyst under conventional heating conditions in water or microwaveirradiationunder solvent-free conditions.
An atom-efficient, one-pot, three-component synthetic method, using silica–sulfuric acid nanoparticles as catalyst, has been developed for preparation of biologically important spirooxindoles. The reaction involves the use of isatin or 5-fluoroisatin, malononitrile, and enolizable systems. A wide range of enolizable systems can be used in this reaction, furnishing excellent yields in a short time. The catalyst is recyclable with reproducible results without any loss of its activity. The morphology of the silica–sulfuric acid nanoparticles was observed by scanning electron microscopy. Some of the compounds were new and their structures were deduced by elemental and spectral analysis (IR, 1H NMR, and 13C NMR). Moreover, column chromatography and recrystallization of the products is not required because the crude products are already highly pure.
Base free synthesis of iron oxide supported on boron nitride for the construction of highly functionalized pyrans and spirooxindoles
作者:Aniruddha Molla、Sahid Hussain
DOI:10.1039/c5ra21969h
日期:——
BN@Fe3O4 network was synthesized via chemical reduction followed by aerial oxidation in absence of base and was subsequently used for the synthesis of highly functionalized pyrans and spirooxindoles derivatives on water.
A highly active FeNi3–SiO2 magnetic nanoparticles catalyst for the preparation of 4H-benzo[b]pyrans and Spirooxindoles under mild conditions
作者:Mohammad Ali Nasseri、Seyed Mohsen Sadeghzadeh
DOI:10.1007/s13738-013-0243-3
日期:2013.10
A green and efficient method for the synthesis of various 4H-benzo[b]pyrans and Spirooxindoles in the presence of FeNi3–SiO2 as the nanocatalyst at room temperature is reported. High catalytic activity and ease of recovery from the reaction mixture using an external magnet, and several reuse times without significant losses in performance are additional eco-friendly attributes of this catalytic system
Efficient One-Pot Synthesis of Spirooxindole Derivatives by Ethylenediamine Diacetate Catalyzed Reactions in Water
作者:Yong Lee、Galla Hari
DOI:10.1055/s-0029-1217116
日期:2010.2
A simple and efficient one-pot synthetic approach was used for the preparation of biologically interesting spirooxindole derivatives by means of three-component reactions of isatins, malononitrile, and 1,3-dicarbonyl compounds catalyzed by ethylenediamine diacetate (EDDA) in an aqueous medium. This method is of great value because of its environmentally benign character, high yield, and easy handling