A novel and direct synthetic route to substituted 1,5-dihydro-4H-[1]benzopyrano[4,3-b]pyridine-4,5-diones

A novel and direct synthetic route to substituted 1,5-dihydro-4H-[1]benzopyrano[4,3-b]pyridine-4,5-diones

The condensation of 4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one and substituted 2‐hydroxybenzaldehydes with ammonium acetate gave the title heterocycles. Synthesis of 1,5‐dihydro‐2‐methyl‐4H‐[1]naphtho‐[1′,2′:5,6]pyrano[4,3‐b]‐pyridine‐4,5‐dione is also described. A reaction mechanism is discussed....

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Veröffentlicht in:Journal of heterocyclic chemistry 2000-03, Vol.37 (2), p.395-399
Hauptverfasser: Světlík, Jan, Prónayová, Nad'A, Hanuš, Vladimír
Format: Artikel
Sprache:eng
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Zusammenfassung:The condensation of 4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one and substituted 2‐hydroxybenzaldehydes with ammonium acetate gave the title heterocycles. Synthesis of 1,5‐dihydro‐2‐methyl‐4H‐[1]naphtho‐[1′,2′:5,6]pyrano[4,3‐b]‐pyridine‐4,5‐dione is also described. A reaction mechanism is discussed.
ISSN:0022-152X
1943-5193
DOI:10.1002/jhet.5570370227