Journal of the Chemical Society. Perkin transactions I p. 2273 - 2276 (1981)
Update date:2022-08-05
Topics:
O'Callaghan, Conor N.
The base-catalysed condensation of 3-carbamoyl-2-iminochromens with methyl ketones yields 2-alkyl-5-imino-1-benzopyrano<3,4-c>pyridin-4(3H,5H)-ones, 2-alkyl-1-benzopyrano<3,4-c>pyridin-4(3H),5-diones, and 3-cyano-4-(2-hydroxyphenyl)-6-methyl-3,4-dihydropyridin-2-ones (which exist in two tautomeric forms).
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