Diisopropylethylamine → 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-N-(1-methylcyclobutyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Participants

Reaction Steps

To a stirred solution of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (59 mg, 0.19 mmol), HATU (91.20 mmol, 0.24 mmol) and DIPEA (49 mg, 0.38 mmol) in 6 mL of DMF, 1-methylcyclobutanamine (21.00 mg, 0.25 mmol) was added in one portion at room temperature and the reaction mixture was stirred for 16 hours. The solvent was evaporated at 80° C. under reduced pressure and the residue was purified by preparative-HPLC (Gemini 5u C18 150×21.2 mm; inject volume: 3 mL/inj, flow rate: 20 mL/min; wavelength: 214 nm and 254 nm; the gradient conditions were: 48% acetonitrile/52% water (0.1% trifluoroacetic acid, v/v) initially, proceeding to 70% acetonitrile/30% water (0.1% trifluoroacetic acid, v/v) in a linear fashion over 9 min.) to give 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-N-(1-methylcyclobutyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (10 mg, 13.7%) as an off-white solid. MS: (M+H)+=379; 1H NMR (300 MHz, DMSO): δ 12.82 (s, 1H), 9.10 (s, 1H), 8.47-8.38 (m, 2H), 8.24 (s, 1H), 7.70 (d, 1H, J=8.7 Hz), 7.17 (t, 1H, J=9.2 Hz), 4.15 (s, 3H), 2.54-2.45 (m, 2H), 2.15-2.13 (m, 2H), 1.96-1.88 (m, 2H), 1.62 (s, 3H).

Provenance & Evidence