Trifluoroacetic acid → HCID 71280612, compound

Participants

Reaction Steps

To a stirred solution of N-tert-butyl-2-(5-(difluoromethoxy)-1-(3-(3,3-difluoropyrrolidin-1-yl)propyl)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (91.4 mg, 135 μmol) in dichloromethane (2 mL) was added trifluoroacetic acid (1 mL). After 15 h the mixture was concentrated in vacuo. 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane was added, and the reaction mixture stirred for 1 h then concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-{5-Difluoromethoxy-1-[3-(3,3-difluoro-pyrrolidin-1-yl)-propyl]-1H-indazol-3-yl}-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (32 mg, 43%). MS (M+H)+=548; 1H NMR (DMSO-d6) δ: 9.09 (s, 1H), 8.38 (s, 1H), 8.21 (d, J=2.3 Hz, 2H), 7.88 (s, 2H), 7.86 (s, 1H), 7.36-7.43 (m, 1H), 6.92-7.49 (m, 1H), 4.59 (t, J=6.8 Hz, 2H), 2.84 (t, J=13.6 Hz, 2H), 2.64 (t, J=7.0 Hz, 2H), 2.43 (t, J=6.7 Hz, 1H), 2.15-2.29 (m, 2H), 2.08 (t, J=7.0 Hz, 2H), 1.51 (s, 9H).

Provenance & Evidence