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Diammonium Hydrogen Phosphate as an Efficient and Inexpensive Catalyst for the Synthesis of Bis(indolyl)methanes under Solvent-Free Conditions

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Summary.

Bis(indolyl)methanes were synthesized by the reaction of indole derivatives and aromatic and aliphatic aldehydes in the presence of diammonium hydrogen phosphate as a solid catalyst under solvent-free conditions. This methodology offers significant improvements for the synthesis of bis(indolyl)methanes with regard to the yield of products, simplicity in operation, and green aspects by avoiding toxic catalysts and solvents.

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Correspondence to Minoo Dabiri or Peyman Salehi.

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Dabiri, M., Salehi, P., Baghbanzadeh, M. et al. Diammonium Hydrogen Phosphate as an Efficient and Inexpensive Catalyst for the Synthesis of Bis(indolyl)methanes under Solvent-Free Conditions. Monatsh. Chem. 138, 595–597 (2007). https://doi.org/10.1007/s00706-007-0658-6

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  • DOI: https://doi.org/10.1007/s00706-007-0658-6

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