| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5224449 | Tetrahedron | 2009 | 4 Pages |
Abstract
4-Hydroxycoumarin-3-carboxaldehyde (5) was obtained from chromone-3-carboxaldehyde (1) via chromone-3-carboxamide (2) and 3-aminomethylene-2H-chroman-2,4-dione (3). 3-Alkylaminomethylenechroman-2,4-diones (7,8) were obtained from the reaction of primary aliphatic amines with chromone-3-carboxamide (2). Treatment of chromone-3-carboxamide with sodium methoxide gives 3-(2-hydroxybenzoyl)-2H-chromeno[2,3-b]pyridine-2,5(1H)-dione (9).
Graphical abstractThe action of bases (NH4OH, NaOH, RNH2 and sodium methoxide) on chromone-3-carboxamide was studied.Download full-size image
Related Topics
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Organic Chemistry
Authors
Magdy A. Ibrahim,