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2,3-Dihydrobenzofuran-6-yl acetate (0.250 g, 1.403 mmol) was used as raw material and dissolved in tetrahydrofuran (7.0 mL). To this solution was added saturated aqueous potassium carbonate (3.5 mL) and the reaction mixture was stirred at room temperature for 3 hours. After completion of the reaction, the reaction solution was diluted with ethyl acetate (100 mL) and washed sequentially with water (2 x 100 mL) and saturated aqueous sodium chloride solution (100 mL). The organic phase was dried with anhydrous sodium sulfate, filtered and concentrated. Purification by high performance liquid chromatography (HPLC) using 8:2 hexane:ethyl acetate as eluent gave 2,3-dihydro-6-hydroxybenzofuran as a light yellow oil (189.0 mg, 99% yield). Determination by high resolution mass spectrometry (HRMS): calculated value m/z 137.0602; measured value m/z 137.0575.

[1] Patent: WO2005/100301, 2005, A1. Location in patent: Page/Page column 64
[2] Journal of the American Chemical Society, 1948, vol. 70, p. 3619
[3] Organic Syntheses, 1950, vol. 30, p. 22