Triethylamine → 1-(8-(5,6-Dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)pyrrolidine-3-carboxylic acid

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Reaction Conditions

Reaction Steps

A suspension of 6-chloro-N-(5,6-dimethoxypyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine (1 g, 3.27 mmol), methylpyrrolidine-3-carboxylate (1.69 g, 13.1 mmol), triethylamine (1.32 g, 13.1 mmol) and cesium carbonate (4.26 g, 13.1 mmol) was heated to 180° C. for 2 h. The residue was purified by chromatography (silica gel, 200-300 mesh, dichloromethane:MeOH=20:1) to give 1-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)pyrrolidine-3-carboxylic acid (80 mg, 6%) as a red solid. LC-MS: 385 [M+1]+, tR=1.258 min

Provenance & Evidence