m-Chloroperbenzoic acid → HCID 86693879, compound

Participants

Reaction Steps

To a stirred solution of compound 9 (5.0 g, 17.5 mmol) in dichloromethane (40 mL) at room temperature was added portion wise m-CPBA (13.6 g, 78.9 mmol). Mixture was stirred at room temperature for 6 h, quenched with saturated NaHCO3 solution and the mixture was extracted with DCM (50 mL×2). The combined organic layers were washed with brine (40 mL×2) dried over Na2SO4. The solvent was removed under reduced pressure and residue was purified by silica gel column chromatography (3% EtOAc/Hexane) to give epoxide 10 (3.5 g, 66%) as an oil. [α]24D +58.19° (c 1.0, CHCl3); 1H NMR (500 MHz, CDC13) δ 4.54-4.52 (m, 1H), 3.91-3.90 (m, 1H,), 3.73-3.69 (m, 1H), 3.59-3.55 (m, 3H), 2.316-2.311 (m, 1H), 1.38 (s, 3H), 1.22 (s, 3H), 0.83-0.82 (m, 9H), 0.006-0.000 (m, 6H); HR-MS Calcd. For (C15H28O4Si+H)+ 301.1757, found 301.1895.

Provenance & Evidence