3,3,3-Trifluoropropionic acid → HCID 15948038, compound

Participants

Reaction Steps

4-(5-{5-[1-(2,5-Dichloro-phenyl)-4-trifluoromethyl-1H-imidazol-2-yl]-thiophen-2-yl}-pyridin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester (104 mg, 0.17 mmol) was mixed with 4 mL 50% trifluoromethylacetic acid in dichloromethane, and stirred at room temperature for 2 hrs. All solvent was removed; the residue was redissolved in dichloromethane and neutralized to pH 7 by saturated NaHCO3. The organic layer was washed with brine, dried over Na2SO4, and concentrated in vacuo. The residue was precipitated from dichloromethane/Hexane mixture, then filtered and washed several times with dichloromethane to give yellow solid (50 mg, 57% yield). 1H-NMR. (400 MHz, CDCl3): δ 3.30-2.97 (m, 4H), 3.57-3.54 (m, 4H), 6.63 (d, J=8.7, 1H), 6.78 (d, J=4.0, 1H), 6.96 (d, J=4.0, 1H), 7.31 (s, 1H), 7.60-7.50 (m, 4H), 8.37 (m, 1H). MS (ES): 524.3, 526.5, [M+H]+

Provenance & Evidence