Synthetic Communications p. 3225 - 3237 (2007)
Update date:2022-08-05
Topics: Functionalization Characterization Cyclization Purification Starting Material Hydroxylation Introduction of Functional Groups Imidoyl Formation N-Hydroxyalkanimidoyl Formation
El-Essawy, Farag A.
Khattab, Ahmed F.
Zahran, Magdy A.
Gomaa, Sherif H.
Reaction of 4-hydroxy-6-methyl-2(1H)-pyridones 1a and 4-hydroxy-1,6- dimethyl-2(1H)-pyridones 1b with diethyl malonates 2a-e leads to the formation of pyrano[3,2-c]pyridines 4a-j. Degradation of 4a-i affords the corresponding ketones 6a-i. Condensation of ketones 6a-i with hydroxyl amine or phenyl hydrazine hydrochloride is described. Copyright Taylor & Francis Group, LLC.
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