Reactions of 3-acyl-substituted 2H-1-ben
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Bojilova, Anka ;Rodios, Nestor ;Nicolova, Rositsa ;Ivanov, Christo
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Article
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1991
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John Wiley and Sons
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English
⚖ 587 KB
## Abstract 3‐Pivaloyl‐2__H__‐1‐benzopyran‐2‐one (6) reacts with acid anhydrides in the presence of triethylamine to give 4‐(2‐oxoalkyl)‐2‐oxochromans 7 and 3‐pivaloyl‐2‐oxochroman (8) in moderate yields. Also 3‐propionyl‐ and 3‐isobutyryl‐2__H__‐1‐benzopyran‐2‐ones (9) react with acid anhydrides u