Synthesis of bis(indolyl)methanes using ammonium niobium oxalate (ANO) as an efficient and recyclable catalyst

A green and efficient procedure was developed for the synthesis of bis(indolyl)methanes using ammonium niobium oxalate (ANO) NH sub(4)[NbO(C sub(2)O sub(4)) sub(2)(H sub(2)O)x].nH sub(2)O as the catalyst and water or glycerol as the solvent. Products were obtained in good to excellent yields under c...

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Bibliographic Details
Published in:Green chemistry : an international journal and green chemistry resource : GC 2015-08, Vol.17 (8), p.4334-4339
Main Authors: Mendes, Samuel R, Thurow, Samuel, Penteado, Filipe, da Silva, Maite S, Gariani, Rogerio A, Perin, Gelson, Lenardao, Eder J
Format: Article
Language:English
Subjects:
Catalysts
Glycerols
Heating
Niobium
Oxalates
Solvents
Synthesis
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Summary:A green and efficient procedure was developed for the synthesis of bis(indolyl)methanes using ammonium niobium oxalate (ANO) NH sub(4)[NbO(C sub(2)O sub(4)) sub(2)(H sub(2)O)x].nH sub(2)O as the catalyst and water or glycerol as the solvent. Products were obtained in good to excellent yields under conventional heating (water, 50 degree C) or under sonication (glycerol, 110 degree C). In the reaction in water, the catalyst was easily reused for further reactions without loss of activity.
ISSN:1463-9262
1463-9270
DOI:10.1039/c5gc00932d