Trifluoroacetic acid → HCID 86688459, compound

Participants

Reaction Steps

Trifluoroacetic acid (0.5 mL) was added to a solution of crude (R)-t-butyl 2-((S)-4-(1-((R)-1-(2,4-dichlorophenyl)ethyl)-1H-benzo[d][1,2,3]triazol-6-yl)-2-(hydroxymethyl)piperazine-1-carbonyl)pyrrolidine-1-carboxylate (0.065 g, 0.11 mol) in dichloromethane (1.5 mL) and the resulting mixture was stirred at room temperature for 1 h. Excess solvent was removed in vacuo, and the residue was diluted with dichloromethane (10 mL). The organic layer was neutralized with saturated aqueous sodium bicarbonate, and the aqueous layer was further extracted with dichloromethane (2×20 mL). The combined organic layers were dried (Na2SO4), filtered, and concentrated in vacuo. The crude product was purified by flash chromatography (SiO2, 5-20% methanol in dichloromethane) to give the title compound as a white solid (0.032, 0.064 mol, 59%). 1H NMR (400 MHz, CDCl3) δ 7.88 (d, J=9.2 Hz, 1 H), 7.41 (s, 1 H), 7.16-7.15 (m, 2 H), 7.03 (dd, J=2.0, 8.8 Hz, 1 H), 6.57 (s, 1 H), 6.24 (q, J=6.8 Hz, 1 H), 4.78-4.74 (m, 1 H), 4.02-3.76 (m, 4 H), 3.62-3.54 (m, 2 H), 3.22-3.16 (m, 1 H), 2.98-2.87 (m, 3 H), 2.14 (d, J=6.8 Hz, 3 H), 1.96-1.73 (m, 6 H); MS: (ES) m/z calculated for C24H29Cl2N6O2 [M+H]+ 503.2, found 503.4.

Provenance & Evidence