Hydrogen Peroxide → 4-(2'-Carboxy-2'-methylpropylsulfinyl)phenyl 2-Phenylbutyrate

Participants

Reaction Steps

To a solution of 4-(2'-carboxy-2'-methylpropylmercapto)phenyl 2-phenylbutyrate (745 mg, 2 mmol) in 1 mL of glacial acetic acid was added 0.25 mL of 30% H2O2. Additional 0.25 mL aliquots of 30% H2O2 were added at one-half hour intervals until TLC indicated complete consumption of the starting material. The reaction was quenched with 20 mL of H2O, extracted with Et2O (2×25 mL), dried over anhydrous MgSO4 and evaporated to give the sulfoxide containing a residual amount of acetic acid. The residue was suspended in 20 mL of H2O, the mixture was shell frozen and lyophilized to give 506 mg (65%) of the pure product sulfoxide. 1H NMR (CDCl3) δ1.00 (t, 3H, J=7.4 Hz), 1.42 (s, 3H), 1.54 (s, 3H), 1.85-1.99 (m, 1H), 2.16-2.31 (m, 1H), 3.07 (s, 2H), 3.72 (t, 1H, J=7.6 Hz), 7.17 (d, 2H, J=8.7 Hz), 7.32-7.40 (ArH, 5H), 7.70 (d, 2H, J=8.7 Hz), 11.17 (br s, --OH); 13C NMR (CDCl3) δ 11.83, 24.54, 25.71, 26.39, 41.73, 53.26, 68.81, 122.75, 125.60, 127.73, 128.10, 128.98, 138.30, 141.34, 153.11, 172.49, 180.33.

Provenance & Evidence