Abstract
The three-component condensation of aromatic aldehydes, methylurea, and α-nitroacetophenone affords both N(1)-and N(3)-methyl-substituted 4,6-diaryl-5-nitro-3,4-dihydropyrimidin-2(1H)-ones depending on the structure of aldehyde. Intermediate 4,6-diaryl-4-hydroxy-3-methyl-5-nitrohexahydropyrimidin-2-ones and trisubstituted urea, which is the transformation product of the 4-hydroxy-3-methyl derivative in an acidic medium (retro-Henry reaction), were identified in the reaction mixtures.
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Dedicated to the memory of Academician N. N. Vorozhtsov on the 100th anniversary of his birth.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1141–1145, June, 2007.
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Sedova, V.F., Krivopalov, V.P. & Shkurko, O.P. Three-component condensation of α-nitroacetophenone, aromatic aldehydes, and methylurea. Russ Chem Bull 56, 1184–1189 (2007). https://doi.org/10.1007/s11172-007-0180-3
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DOI: https://doi.org/10.1007/s11172-007-0180-3