Trifluoroacetic acid → 2-[1-(4-Chlorophenyl)-1-{7-[(methylsulfanyl)methyl]-1H-indol-3-yl}ethyl]cyclopropanecarbonitrile

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Reaction Steps

150 mg (0.68 mmol) of the compound from Example 75A and 120 mg (0.68 mmol) of the compound from Example 8A were introduced into 4 ml of dichloromethane at 0° C., 157 mg (0.71 mmol) of indium(III) chloride were added, and the mixture was stirred at RT for 1 h and under reflux for 0.5 h. After cooling, 0.05 ml (0.68 mmol) of trifluoroacetic acid was added, and the mixture was stirred under reflux for 5 min. It was diluted with dichloromethane, washed with saturated aqueous sodium bicarbonate solution, water and saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and concentrated. The residue was purified by preparative HPLC (RP18 column; mobile phase: acetonitrile/water gradient with addition of 0.1% formic acid) to result in 117 mg (45% of theory) of the title compound as mixture of diastereomers.

Provenance & Evidence