Abstract
The reaction between 2‐hydroxybenzaldehyde and 4‐hydroxy‐6‐methyl‐2‐pyrone (triacetic acid lactone) affords 3‐acetoacetyl‐2‐chromenone, 7, instead of 3‐(2‐hydroxybenzylidene)‐6‐methyl‐3,4‐dihydro‐2H‐pyran‐2,4‐dione, 6. The structures previously reported in the literature for the products formed in the reactions of 4‐hydroxy‐2‐chromenone with 2‐hydroxybenzaldehydes in a molar ratio 1:1 are considered erroneous. Thus, the previously reported 3‐(2‐hydroxybenzylidene)chroman‐2,4‐dione, 10, should be formulated as 3‐(2‐hydroxybenzoyl)‐2‐chromenone, 11. Copyright © 1984 Journal of Heterocyclic Chemistry
| Original language | English |
|---|---|
| Pages (from-to) | 1371-1372 |
| Journal | Journal of Heterocyclic Chemistry |
| Volume | 21 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Jan 1984 |
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De March, P., Moreno‐Mañas, M., & Roca, J. L. (1984). The reactions of 4‐hydroxy‐2‐pyrones with 2‐hydroxybenzaldehydes. A note of warning. Journal of Heterocyclic Chemistry, 21(5), 1371-1372. https://doi.org/10.1002/jhet.5570210525