1: 89 percent / m-chloroperbenzoic acid / CH2Cl2 / -15 - -5 °C 2: 1.) trifluoroacetic anhydride, 2.) triethylamine / 1.) CH2Cl2, RT, 3 h, 2.) CH2Cl2, RT, 2 h 3: 70 mg / oxone / tetrahydrofuran; H2O / 72 h / Ambient temperature 4: 19 percent / NaBH4 / tetrahydrofuran; D2O / 0.25 h / Ambient temperature; other vinyl sulfoxides, other reagents, other solvents, var. time View Scheme