Trifluoroacetic acid → HCID 71279930, compound

Participants

Reaction Steps

To a stirred solution of N-tert-butyl-2-(5-methyl-1H-pyrazolo[3,4-b]pyridin-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (0.1 g, 208 μmol) in dichloromethane (3 mL) was added trifluoroacetic acid (1 mL). After 15 h, the mixture was concentrated in vacuo then 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane added. After 1 h the mixture was concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-(5-methyl-pyrazolo[3,4-b]pyridin-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (10 mg, 14%). MS (M+H)+=350; 1H NMR (DMSO-d6) δ: 9.08 (s, 1H), 8.54 (d, J=1.8 Hz, 1H), 8.50 (s, 1H), 8.39 (s, 1H), 8.28 (s, 1H), 8.21 (dd, J=2.0, 0.8 Hz, 1H), 1.49 (s, 9H).

Provenance & Evidence