Trifluoroacetic acid → HCID 59231991, compound

Participants

Reaction Steps

To a solution of tert-butyl 4-[4-amino-5-(2-benzyl-2H-indazol-6-yl)pyrrolo[2,1-f][1,2,4]triazin-7-yl]piperidine-1-carboxylate (325 mg, 0.62 mmol) in dichloromethane (3 mL) was added trifluoroacetic acid (1 mL). The reaction was stirred (rt) for 17 h. The mixture was made basic (pH 9) with the addition of saturated aqueous NaHCO3 and the layers were separated. The aqueous phase was back extracted with dichloromethane (2×10 mL) and the combined organics were washed with brine, dried (Na2SO4), and evaporated to afford 299 mg (100%) of the desired product, which contained trace impurities. 1H NMR (300 MHz, DMSO-d6) δ 8.53 (s, 1 H), 7.87 (s, 1 H), 7.78 (d, 1 H), 7.57 (s, 1 H), 7.36-7.30 (m, 5 H), 7.13 (d, 1 H), 6.55 (s, 1 H), 5.64 (s, 2 H), 3.41 (br s, 1 H), 3.30-3.18 (m, 1 H), 3.07 (d, 2 H), 2.75-2.64 (m, 2H), 1.97 (d, 2 H), 1.68-1.53 (m, 2 H); ES-MS m/z 424.3 [M+H]+, HPLC RT (min) 0.78.

Provenance & Evidence