1-Methylimidazole → Tert-butyl 4-(3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamido)benzoate

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Reaction Steps

A mixture of 3-(8-(6-(2-Methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid (49 mg, 0.12 mmol), tert-butyl 4-aminobenzoate (23 mg, 0.12 mmol), EDCI (92 mg, 0.48 mmol), N-methyl-imidazole (40 mg, 0.48 mmol) and dichloromethane (3 mL) was stirred at room temperature for 16 h. The solution was concentrated in vacuo and the residue was purified by chromatography (silica gel, 200-300 mesh, CH2Cl2:MeOH=40:1˜100:1) to give tert-butyl 4-(3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamido)benzoate (43 mg, 61%) as a yellow oil. [M+H]+, 590.2, tR=2.283 min.

Provenance & Evidence