Trifluoroacetic acid → 2-[[5-cyclopropyl-4-[(1S)-2,2,2-trifluoro-1-methyl-ethoxy]pyridine-2-carbonyl]amino]-3,3-dimethyl-butanoic acid

関与物質

反応手順

To a solution of tert-butyl 2-[[5-cyclopropyl-4-[(1S)-2,2,2-trifluoro-1-methyl-ethoxy]pyridine-2-carbonyl]amino]-3,3-dimethyl-butanoate (example 199a, 0.485 g, 1.09 mmol) in dichloromethane (3 ml) was added trifluoroacetic acid (3.73 g, 2.52 ml, 32.8 mmol) and the reaction mixture was stirred at room temperature for 14 hours. Volatiles were removed in vacuo and the residue was dissolved in toluene followed by evaporation to dryness. The procedure was repeated twice to yield the title compound (446 mg) as a crude solid which was used without any purification. MS (ESI, m/z): 387.5 (M−H+).

情報源と証拠