Ozone → HCID 10846567、化合物

An ozone stream (1.5 g ozone/hour) was conducted for 30 minutes while stirring through a solution, cooled to -70°, of 3.38 g of (RS)-2-(2-buten-1-yl)-6-fluoro-3,3-dimethyl-1-indanone in 75 ml of anhydrous dichloromethane and 15 ml of anhydrous methanol. Subsequently, the mixture was flushed with oxygen for 5 minutes and with argon for 10 minutes. After the addition of 1.6 ml of dimethyl sulfide, the mixture was stirred at room temperature for 17 hours. The reaction mixture was evaporated in a vacuum. The residue was treated with 40 ml of dichoromethane and, after the addition of 5 ml of water and 5 ml of trifluoroacetic acid, stirred at room temperature for 2 hours. The mixture was subsequently poured into 90 ml of water and neutralized by the spatula-wise addition of sodium hydrogen carbonate while stirring. An additional 50 ml of water were added, the phases were separated and the aqueous phase was extracted twice with 100 ml of dichloromethane each time. The combined organic phases were dried over magnesium sulfate and concentrated in a vacuum. 3.04 g (95%) of (RS)-2-(2-oxoethyl)-6-fluoro-3,3-dimethyl-1-indanone were obtained as a light yellow oil.