Abstract
The condensation of ω-substituted acetophenones with benzylidenebisurea in an acid medium has given 5-R-2-oxo-4,6-diphenyl-1,2,3,4-tetrahydropyrimidones. The analogous condensation of propiophenone forms 5-methyl-2-hydroxy-4,6-diphenylpyrimidine. The tetrahydro derivatives obtained are readily dehydrogenated to 5-R-2-hydroxy-4,6-diphenylpyrimidines.
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For part XX, see [1].
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Mamaev, V.P., Dubovenko, Z.D. Pyrimidines. Chem Heterocycl Compd 6, 501–504 (1970). https://doi.org/10.1007/BF00478403
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DOI: https://doi.org/10.1007/BF00478403