Xanthydrol → ethyl 2-(9H-xanthen-9-yl)-2-(3-methoxy-4-methoxycarbonylbenzoyl)acetate

関与物質

反応手順

To a stirred solution of ethyl 3-methoxy-4-methoxycarbonylbenzoylacetate (4.1 g, 14.6 mmol) in a mixture of ethanol (30 ml) and acetic acid (30 ml) was added portionwise 9-hydroxyxanthene (3.2 g, 16.1 mmol). After stirring for 2 weeks at room temperature, the solution was concentrated in vacuo, diluted with water and extracted with dichloromethane (2×). The combined extracts were washed with a saturated solution of sodium bicarbonate, water and dried over magnesium sulphate. Filtration and evaporation gave ethyl 2-(9H-xanthen-9-yl)-2-(3-methoxy-4-methoxycarbonyl-benzoyl)acetate as an oil.

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