3-Hydroxyazetidine hydrochloride → 5-[2,6-Difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-2-({2-[(3-hydroxyazetidin-1-yl)carbonyl]imidazo[1,2-b]pyridazin-6-yl}amino)thiophene-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

Ethyl 6-({3-(aminocarbonyl)-5-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-2-thienyl}amino)imidazo[1,2-b]pyridazine-2-carboxylate (33 mg, 0.07 mmol) was taken up in tetrahydrofuran and cooled to 0° C. Trimethylaluminum (0.53 ml, 1.06 mmol) was added dropwise, followed by 3-hydroxyazetidine hydrochloride (7 mg, 0.07 mmol). The reaction was stirred at 0° C. for one hour, warmed to room temperature and allowed to react overnight. The reaction was then quenched slowly with methanol, followed by stirring for 10 minutes at room temperature. The resulting mixture was filtered, washing the solids with ethyl acetate and water. The filtrate was collected, the phases were separated and the aqueous layer was extracted with ethyl acetate. The combined organics were concentrated under and purified via flash chromatography (0-15% methanol in dichloromethane) to afford the title compound.

Provenance & Evidence