HCID 11337288, compound → HCID 11280269, compound

Participants

Reaction Steps

The methyl 3-[3-fluoro-4-(methylthio)phenyl]-4-phenyl-2-thiophenecarboxylate (5.00 g, 13.9 mmol) was dissolved in dichloromethane (100 mL) and methanol (30 mL). Magnesium monoperoxyphathalate hexahydrate (MMPP)(3.78 g of 80%, 7.6 mmol) was added in five equal portions at one minute intervals. The resulting heterogeneous solution was stirred for 1 hour. Additional MMPP (600 mg, 1.6 mmol) was added and the solution stirred for 15 min. The reaction was complete and solution extracted with saturated sodium bicarbonate (2×100 mL). The organic layer was dried over sodium sulfate and solvent removed at reduced pressure. Methyl 3-[3-fluoro-4-(methylsulfinyl)phenyl]-4-phenyl-2-thiophenecarboxylate was isolated by crystallization from dichloromethane and hexanes. (81% yield): Mp 164.0-164.1° C. 1H NMR (CDCl3/300 MHz) 7.75 (t, 1H, J=7.7 Hz), 7.53 (s, 1H), 7.15-7.26 (m, 3H), 6.94-7.40 (m, 3H), 3.90 (s, 3H), 2.85 (s, 3H). ESHRMS m/z 375.0536 (calcd for M+H, 375.0525).

Provenance & Evidence