One-Pot Three-Component Synthesis of Spirooxindoles Catalyzed by Hexamethylenetetramine in Water
作者:Guo-Dong Wang、Xiao-Nan Zhang、Zhan-Hui Zhang
DOI:10.1002/jhet.994
日期:2013.1
convenient, and multicomponent strategy for synthesis of spirooxindole derivatives has been developed. This strategy provides a rapid access to construct a diversity‐oriented library of spirooxindoles by using three simple and readily available isatin, malononitrile or cyanoacetic ester, and 1,3‐dicarbonyl compound catalyzed by hexamethylenetetramine in water.
Guanidine functionalized core–shell structured magnetic cobalt-ferrite: an efficient nanocatalyst for sonochemical synthesis of spirooxindoles in water
作者:Mahla Dadaei、Hossein Naeimi
DOI:10.1039/d1ra00967b
日期:——
modified by changing the ingredients or the ratio of core to the shell. In this research, a CoFe2O4@SiO2-guanidine nanocomposite was prepared and identified as an efficient catalyst for the one-pot synthesis of spirooxindole derivatives in water under ultrasonic irradiation conditions. The advantages of this method are in its simplicity, saving costs and energy, high yields, short reaction times, environmental
Oxalic acid dihydrate: proline as a new recyclable designer solvent: a sustainable, green avenue for the synthesis of spirooxindole
作者:Dattatray R. Chandam、Abhijeet G. Mulik、Dayanand R. Patil、Madhukar B. Deshmukh
DOI:10.1007/s11164-015-2093-3
日期:2016.2
encouraged to explore oxalic acid dihydrate: proline low transition temperature mixture as a new designer solvent for the said synthesis at room temperature. It has been successfully applied for the three componentreaction of isatin, malononitrile or ethyl cyanoacetate and 1,3–dicarbonyl compounds for the first time. Moderate to good yield of the products, shorter reaction time, energy efficiency, chromatography-free
Triphenylphosphine Catalyzed, One-Pot, Multicomponent Synthesis of Spirooxindoles
作者:Syed Riyaz、A. Naidu、Pramod K. Dubey
DOI:10.2174/157017812800221771
日期:2012.2.1
Multicomponent reaction involving isatin (1), malononitrile (2), and dimedone (3), in the presence of triphenylphosphine as an efficient catalyst in the eco-friendly solvent ethanol, results in the formation of spirooxindole derivatives 4 i.e 2-Amino-5-oxo-7,7-dimethyl spiro[(4H)-5,6,7,8-tetrahydrochromene-4,3-(3H)-indol]-(10H)-2-onecarbonitrile. The reaction proceeds smoothly under mild conditions and the products are obtained in good to excellent yields. This method is applicable to a variety of isatin derivatives.
A Simple and One-pot Synthesis of Tetrahydrobenzo[b]pyrans and Spirooxindoles Catalyzed by H-Fe3O4@DA-SO3H as an Efficient, Light and Reusable Nanocatalyst
chemistry is using inexpensive reagents and catalysts to design green route for synthesis of organic compounds. Recently magnetic nanoparticles have provided a considerable merits. In this study, hollow Fe3O4@Dopamine-SO3H has been successfully applied for the green synthesis of tetrahydrobenzo[b]pyrans and spirooxindoles via one-pot multi-component reaction. MATERIALS AND METHODS Chemical reagents were purchased