1-Methylimidazole → 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)-N-(1-oxoisoindolin-5-yl)benzamide

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Reaction Steps

A mixture of 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid (100 mg, 0.26 mmol), 5-aminoisoindolin-1-one (38 mg, 0.26 mmol), 1-methyl-1H-imidazole (84 mg, 1.02 mmol) and EDCI (196 mg, 1.02 mmol) in DMF (3 mL) was stirred for 16 h at room temperature. Ethyl acetate (5 mL) and water (5 mL) were added. The organic layer was separated and the aqueous phase was extracted with ethyl acetate (20 mL). The organic phases were combined and washed with brine (10 mL) then dried over Na2SO4. The residue was concentrated and triturated with MeOH (2 mL) to give 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)-N-(1-oxoisoindolin-5-yl)benzamide (26 mg, 20%) as a yellow solid. 1H NMR (300 MHz, DMSO): δ 10.68 (s, 1H), 9.97 (s, 1H), 8.61 (s, 1H), 8.52 (s, 1H), 8.44 (s, 1H), 8.24-8.08 (m, 4 h), 7.82-7.64 (m, 4 h), 7.41 (d, 1H, J=8.7 Hz), 7.11 (d, 1H, J=8.4 Hz), 4.39 (s, 2H), 4.02 (s, 3H), 3.76 (s, 3H). LC-MS: [M+H]+, 521.9, tR=1.434 min, HPLC: 96.12% at 214 nm, 96.79% at 254 nm, tR=3.673 min.

Provenance & Evidence