反应详情

温度

55 °C

p-Toluene sulfonic acidmonohydrate (207 mg, 1.21 mmol) was added to a mixture composed of benzyl 2-(1,4-dioxaspiro[4,5]decan-8-yl)acetate (7.0 g, 24.11 mmol), acetone (220 ml), and water (10 ml) at room temperature, and the mixture was stirred at 55° C. for 15 hr. The mixture was cooled with ice and was adjusted to pH 5 by the addition of solid sodium bicarbonate. The mixture was concentrated under reduced pressure, and the residue was chromatographed on silica gel column (hexane:ethyl acetate=85:15) to give the title compound as a colorless solid (5.1 g, yield 86%).

1. temperatureThe mixture was cooled with ice
2. concentrationThe mixture was concentrated under reduced pressure
3. customthe residue was chromatographed on silica gel column (hexane:ethyl acetate=85:15)