Methoxy-substituted 2-isopropenyl-2,3-dihydrobenzofurans were prepared from methoxy-substituted phenols and 1,4-dibromo-2-methyl-2-butene in one-step reactions. Their acylations with acetic acid–trifluoroacetic anhydride or N-methylformanilide–phosphoryl chloride were studied.
Die Titelverbindungen (I) werden in 5‐Position acyliert, (Ia) bevorzugt in 7‐Position: Bildung der Acetylderivate (II) bzw. (III) und der FormyI‐Derivate (IV) bzw. (V).
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