m-Chloroperbenzoic acid → 2-[1-[(4-Chlorophenyl)sulfonyl]-2-methyl-5-(methylsulfonyl)pentyl]-1,4-difluorobenzene

Participants

Reaction Steps

The 2-[1-[(4-chlorophenyl)sulfonyl]-2-methyl-5-(methylsulfinyl)pentyl]-1,4-difluorobenzene (76 mg, 0.18 mmol) obtained in Example 44 was dissolved in methylene chloride (5 ml). Under ice cooling, 3-chloroperbenzoic acid (36 mg, 0.21 mmol) was added. The resulting mixture was stirred at room temperature for 2 hours. The residue obtained by concentrating the reaction mixture was purified by silica gel chromatography (methylene chloride:methanol=100:1) to yield a pale yellowish brown oil. The resulting pale yellowish brown oil was solidified with diethyl ether/methylene chloride, whereby the title compound (61 mg, 77%) was obtained as a white powder.

Provenance & Evidence