Dichloromethane → 3-[(4-Chloro-2-methylphenyl)(4-fluorophenyl)methyl]-7-[(methylsulfinyl)methyl]-1H-indole

130 mg (0.32 mmol) of the compound from Example 102 were introduced into 15 ml of dichloromethane at 0° C., 78 mg (0.32 mmol) of 70% pure meta-chloroperbenzoic acid were added, and the mixture was stirred at RT for 2 h. 2 ml of methanol were added, and the solution was concentrated. The residue was purified by preparative HPLC (mobile phase: acetonitrile/water gradient). 129 mg (96% of theory) of the title compound were obtained as mixture of diastereomers.