Trifluoroacetic acid → 2-[(2-Fluoro-4-methylphenyl){5-fluoro-7-[(methylsulfonyl)methyl]-1H-indol-3-yl}methyl]cyclopropanecarbonitrile

Participants

Reaction Steps

347 mg (1.57 mmol) of indium(III) chloride and 0.18 ml (2.35 mmol) of trifluoroacetic acid were added to 268 mg (1.31 mmol) of the compound from Example 166A and 405 mg (1.57 mmol) of the compound from Example 87A with a purity of 88% under argon in 10 ml of 1,2-dichloroethane, and the mixture was heated under reflux overnight. It was concentrated and the residue was taken up in ethyl acetate, washed with saturated aqueous sodium bicarbonate solution and saturated aqueous sodium chloride solution, dried over sodium 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 358 mg (66% of theory) of the title compound as mixture of diastereomers.

Provenance & Evidence