Abstract
Reaction of barbituric acids with aldehydes and dihydropyridines in one pot under microwave (MW) irradiation in the absence of solvent, affords 55–82% of the 5-benzylated barbituric acids. Use of alkyl nitriles or barbituric acids with indole-3-aldehyde and dihydropyridine (DHP) afforded 3-alkylated indoles in 57–76 % yield. In each case DHPs are converted to pyridines.
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Baruah, B., Naidu, P.S., Borah, P. et al. Synthesis of 5-alkylated barbituric acids and 3-alkylated indoles via microwave-assisted three-component reactions in solvent-free conditions using Hantzsch 1,4-dihydropyridines as reducing agents. Mol Divers 16, 291–298 (2012). https://doi.org/10.1007/s11030-012-9359-0
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DOI: https://doi.org/10.1007/s11030-012-9359-0