SCHEDULED MAINTENANCE
Heating of 5-thiocarbamoyl-(3) and 5-carbamoyl-3-methyl-1-phenyluracil derivatives (5) in ethanolic sodium ethoxide causes a novel ring transformation to give 5-anilinomethylene-4-thiobarbituric acid (2) and 5-anilinomethylenebarbituric acids (6), respectively.
K. Hirota, H. Sajiki, Y. Kitade and Y. Maki, J. Chem. Soc., Perkin Trans. 1, 1989, 1695 DOI: 10.1039/P19890001695
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