Trifluoroacetic acid → HCID 86282035, compound

Participants

Reaction Steps

To a solution of 5-(3,5-dimethylisoxazol-4-yl)-3-(2-hydroxyethylamino)-3-phenylindolin-2-one (32 g, 0.1 mmol) in dichloromethane (500 mL) was added trifluoroacetic acid (20 g) and triethylsilane (20 g). The brown solution was stirred at ambient temperature for 3 h and concentrated in vacuo to dryness. The residue was diluted with dichloromethane (500 mL), washed with saturated ammonium chloride solution (200 mL), brine (3×400 mL), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was crystallized from ether to give the title compound. 1H NMR (400 MHz, DMSO-d6): δH 10.63 (s, 1H), 7.18-7.36 (m, 6H), 6.99-7.04 (m, 2H), 4.82 (s, 1H), 2.32 (s, 3H), 2.15 (s, 3H). MS (ESI) m/e [M+1]+ 305.

Provenance & Evidence