Abstract
Treatment of substituted 2-(2,4-dihydroxyphenacyl)thiazole and 2-(2,4-dihydroxyphenacyl)benzothiazole with propionic and isobutyric anhydrides gives the substituted 2-ethyl-and 2-isopropyl-7-acyloxychromones. The use of pivaloyl chloride gives 1-pivaloyloxy-2-hetarylstyrene derivatives.
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