Hydrogen Peroxide → HCID 11822201, compound

Participants

Reaction Steps

Compound 3 (3.4 g, 12.7 mol) in tetrahydrofuran (93 mL) was cooled in an ice bath. To the stirring solution, in drop-wise fashion, was added hydrogen peroxide (30% aq., 22 mL) and aqueous sodium hydroxide (1M, 61 mL) in tandem using 2 separate addition funnels and utilizing a Claisen adapter. The reaction mixture was stirred for 30 minutes in the ice bath and then for 5 hours at room temperature. The flask was cooled in an ice bath and the peroxide was carefully quenched with manganese dioxide. After filtration of the mixture over a small bed of silica gel followed by rinsing of the silica gel with ethyl acetate, the mixture was washed with brine. The organics were then dried over anhydrous magnesium sulfate, filtered, and evaporated. The resulting oil was treated with pentane to precipitate an off white solid after solvent evaporation yielding 2 g (56%) of compound (4). 1H NMR indicated 20% starting material in the mixture, which was easily removed in the next step (treatment with TFA). The 1H NMR of the product was consistent with that reported in the literature (Synthesis 1998, 775).

Provenance & Evidence