Trifluoroacetic acid → 2-[(2,4-Difluorophenyl){5-fluoro-7-[(methylsulfonyl)methyl]-1H-indol-3-yl}methyl]cyclopropane-carbonitrile

Participants

Reaction Steps

96.9 mg (0.44 mmol) of indium(III) chloride and 0.06 ml (0.72 mmol) of trifluoroacetic acid were added to 113 mg (0.40 mmol) of the compound from Example 87A with a purity of 80% and 100 mg (0.48 mmol) of the compound from Example 162A under argon in 4 ml of dichloromethane, and the mixture was heated under reflux for 1 h. It was diluted with dichloromethane and washed with water and saturated aqueous sodium bicarbonate 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 69.0 mg (41% of theory) of the title compound as mixture of diastereomers.

Provenance & Evidence