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- W2950502783 abstract "Base catalysed condensation of a substituted 2-hydroxyacetophenone with acetic anhydride and sodium acetate followed by cyclization of the intermediate with acid gave substituted 3-acetyl-2-methyl-4H-1-benzopyran-4-ones. These were then brominated with phenyltrimethylammonium tribromide (PTT) to yield the desired 3-(2-bromoacetyl)benzopyran-4-ones. The latter compound on treatment with primary and secondary aryl or alkyl amines, gave the corresponding benzopyran-4-one derivatives." @default.
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- W2950502783 date "2002-07-01" @default.
- W2950502783 modified "2023-09-23" @default.
- W2950502783 title "Multi-step synthesis of benzopyranones<i>via</i>a key step involving reaction of the intermediate compound with phenyltrimethylammonium tribromide" @default.
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- W2950502783 doi "https://doi.org/10.1002/jhet.5570390404" @default.
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