Trifluoromethanesulfonic acid → HCID 19695845, compound

Participants

Reaction Steps

To a solution of 2-(3-benzyloxycarbonylamino-2-oxo-6-phenyl-1,2-dihydro-1-pyridyl)-N-[3,3-difluoro-1-isopropyl-2-oxo-3-(N-phenethylcarbamoyl)propyl]acetamide (0.451 g) in dichloromethane (7 mL) and anisole (0.22 mL) was added trifluoromethanesulfonic acid (0.30 mL). After 1.5 h, the reaction was quenched with saturated sodium bicarbonate. The mixture was extracted with dichloromethane, and the extracts were washed (saturated sodium bicarbonate, brine), dried, and evaporated. The crude product was purified by chromatography, twice, with dichloromethane:methanol (first column: gradient, 99:1, 92:8; second column: gradient, 99:1, 92:8) as the eluent. The resulting material was crystallized from ether and petroleum ether to give the title compound (0.119 g) as a tan solid; TLC: Rf =0.27, dichloromethane:methanol (98:2); 300 MHz NMR: 9.20 (t,1), 8.42 (d,1), 7.38-7.18 (m,10), 6.51 (d,1), 5.97 (d,1), 5.15 (d,2), 4.80 (dd,1), 4.43 (broad s,2), 3.43- 3.29 (m,2), 2.76 (t,2), 2.29-2.13 (m,1), 0.85 (d,3), 0.74 (d,3); MS: m/z=525(M+1).

Provenance & Evidence