Clean synthesis of spiro[indole-3,8â²-phenaleno[1,2-<i>b</i>]pyran]-9â²-carbonitriles and spiro[indole-3,4â²-pyrano[4,3-<i>b</i>]pyran]-3â²-carbonitriles by one-pot, three-component reactions
An environmentally benign three-component reaction in aqueous media has been reported for the synthesis of spiro[indole-3,8′-phenaleno[1,2-b]pyran]-9′-carbonitriles and spiro[indole-3,4′-pyrano[4,3-b]pyran]-3′-carbonitriles. J. Heterocyclic Chem., (2010).
已报道在水性介质中对环境无害的三组分反应可合成螺[吲哚-3,8'-苯并[1,2- b ]吡喃] -9'-腈和螺[吲哚-3,4' -吡喃并[4,3- b ]吡喃] -3′-腈。J.杂环化学。(2010)。
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