Hydrogen Peroxide → HCID 86663662, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-[1-(4′-chloro-4-trifluoromethylbiphenyl-3-yl)methylidene]-2,2,5,5-tetramethyldihydrofuran-3-one (2.50 g, 6.12 mmol) in methanol (75 ml) at 35 ° C. is added 50% aqueous hydrogen peroxide solution (0.70 ml, 12.2 mmol), followed immediately by a solution of 2M aqueous lithium hydroxide (0.76 ml, 1.52 mmol). This mixture is stirred at 35° C. for 45 minutes, then allowed to cooled to room temperature and quenched with saturated sodium metabisulfite solution. The crude product is extracted with diethyl ether (×2), then all organics are combined and dried over magnesium sulfate. After filtration the filtrate is concentrated in vacuo to afford 2-(4′-chloro-4-trifluoromethylbiphenyl-3-yl)-4,4,6,6-tetramethyl-1,5-dioxaspiro[2.4]heptan-7-one (2.59 g) as a yellow gum. This material is used directly in the next step.

Provenance & Evidence