79250-14-9Relevant articles and documents
2-Alkyl-5-imino-1-benzopyranopyridin-4(3H,5H)-ones and Related Compounds from Reaction of 3-Carbomoyl-2-iminochromens with Methyl Ketones
O'Callaghan, Conor N.
, p. 2273 - 2276 (2007/10/02)
The base-catalysed condensation of 3-carbamoyl-2-iminochromens with methyl ketones yields 2-alkyl-5-imino-1-benzopyranopyridin-4(3H,5H)-ones, 2-alkyl-1-benzopyranopyridin-4(3H),5-diones, and 3-cyano-4-(2-hydroxyphenyl)-6-methyl-3,4-dihydropyridin-2-ones (which exist in two tautomeric forms).