Benzene → HCID 12902869, compound

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Reaction Steps

To a solution of 0.25 mole of sodium ethoxide is added 64 g. (0.25 mole) of ethyl 4-(4-hydroxyphenyl)phenylacetate. After stirring two hours the solution is evaporated, benzene is added, and the solution is further evaporated. The residue is dissolved in 800 ml. of benzene, 0.25 mole of ethyl α-chloroacetoacetate is added, and the mixture is stirred at room temperature, then heated at its reflux temperature for 16 hours and filtered hot. Evaporation provides a residue which is dissolved in carbon tetrachloride and filtered through silica gel. This intermediate is treated with concentrated sulfuric acid at 0° C. After stirring one hour, ice is added and the mixture is extracted with benzene. The benzene layer is dried, then evaporated. The residue is recrystallized from a dichloromethane-hexane mixture, then carbon tetrachloride, to provide ethyl 4-(2-ethoxycarbonyl 3-methylbenzofuran-5-yl)phenylacetate, m.p. 110°-112° C.

Provenance & Evidence