An efficient, three-component synthesis of spiro[benzo[<i>g</i>]chromene-4,3â²-indoline]-3-carbonitrile and spiro[indoline-3,5â²-pyrano[2,3-<i>d</i>]pyrimidine]-6â²-carbonitrile derivatives
Abstractmagnified image Spiro[benzo[g]chromene‐4,3′‐indoline]‐3‐carbonitriles and spiro[indoline‐3,5′‐pyrano[2,3‐d]pyrimidine]‐6′‐carbonitriles were synthesized via a three‐component reaction of isatins, 2‐hydroxynaphthalene‐1,4‐dione or 2‐methylpyrimidine‐4,6‐diol, and malononitrile in aqueous media. J. Heterocyclic Chem., (2009).
Copper Ferrite Nanoparticles: An Efficient and Reusable Nanocatalyst for a Green One-Pot, Three-component Synthesis of Spirooxindoles in Water
A green reaction of isatins, active cyanomethanes, and cyclic 1,3-dicarbonyl derivatives for the efficient and simple one-potthree-componentsynthesis of spirooxindole fused heterocycles in refluxing water by use of magnetically recoverable and reusable catalyst is reported. The features of this procedure are, the use of magnetically recoverable and reusable catalyst, mild reaction conditions, high