Trifluoroacetic acid → HCID 54673362, compound

Participants

Reaction Steps

TFA (1.724 g, 1.165 mL, 15.12 mmol) was added to a stirred solution of tert-butyl N-[[4-[5-[2-[bis(tert-butoxycarbonyl)amino]-5-(5-isopropylsulfonyl-2-pyridyl)-3-pyridyl]isoxazol-3-yl]-3-fluoro-phenyl]methyl]-N-methyl-carbamate (198.7 mg, 0.1652 mmol) in DCM (7 mL) and the reaction stirred at ambient temperature for 16 hours. The solvent was removed in vacuo and the residue azeotroped with DCM (×2) and ether (×2). The material was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 μM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]. The fractions were collected, passed through a sodium bicarbonate cartridge and freeze-dried to give the title compound as a white solid (6 mg, 7% Yield). 1H NMR (400.0 MHz, DMSO) δ 1.22 (d, J=6.8 Hz, 6H), 2.20-2.30 (m, 3H), 3.50-3.60 (m, 1H), 3.75 (s, 2H), 7.05 (br s, 2H), 7.35-7.45 (m, 2H), 7.50 (s, 1H), 7.90-8.00 (m, 1H), 8.25-8.40 (m, 2H) and 8.80 (s, 1H) ppm; MS (ES+) 482.0.

Provenance & Evidence