Abstract
Solid acids were developed and applied to the condensation reactions of indole with carbonyl compounds at ambient temperature. Tetra-(indolyl)methanes were obtained by the condensation reaction of indole with dialdehyde compounds.
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Niknam, K., Zolfigol, M.A., Sadabadi, T. et al. Preparation of indolylmethanes catalyzed by metal hydrogen sulfates. JICS 3, 318–322 (2006). https://doi.org/10.1007/BF03245953
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DOI: https://doi.org/10.1007/BF03245953