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Synthesis of 4,10-dihydro-4,10-dioxo-1H-[1]-benzopyrano[3,2-b]pyridine, 4,5-Dihydro-4,5-dioxo-1H-[1]-benzopyrano[2,3–6]pyridine and 1,5-Dihydro-1,5-dioxo-4H-[1]-benzopyrano[3,4-b]pyridine derivatives from aminobenzopyrones

✍ Scribed by David T. Connor; Patricia A. Young; Maximilian Von Strandtmann


Book ID
112126429
Publisher
Journal of Heterocyclic Chemistry
Year
1981
Tongue
English
Weight
400 KB
Volume
18
Category
Article
ISSN
0022-152X

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