Trifluoroacetic acid → HCID 71280222, compound

Participants

Reaction Steps

To a stirred solution of N-tert-butyl-2-(5-(trifluoromethyl)-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (110 mg, 207 μmol) in dichloromethane (3 mL) was added trifluoroacetic acid (1 mL). After 15 h, the mixture was concentrated in vacuo, add 25 mL Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane, stir for 1 hour. concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-(5-trifluoromethyl-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (6 mg, 7%). MS (M−H)−=401; 1H NMR (DMSO-d6) δ: 9.04 (s, 1H), 8.74 (d, J=9.0 Hz, 1H), 8.54 (d, J=2.8 Hz, 1H), 8.46 (s, 1H), 8.39 (d, J=2.5 Hz, 1H), 8.33 (s, 1H), 8.09 (s, 1H), 1.50 (s, 4H), 1.44 (s, 9H).

Provenance & Evidence