Dimethylformamide → 8-(6-amino-4-chloropyridin-2-ylamino)-6-chloro-N-(3-fluoropyridin-4-yl)imidazo[1,2-b]pyridazine-3-carboxamide

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Reaction Steps

To a solution of 4-chloropyridine-2,6-diamine (35.2 mg, 0.245 mmol) in THF (0.5 mL) was added 60% NaH (12.26 mg, 0.307 mmol). The mixture was stirred for 10 min. 5A (40 mg, 0.123 mmol) was added, followed by DMF (0.5 mL). The mixture was stirred at room temperature for 1 h. Water was added and the precipitated solid was collected by filtration, and dried to give crude 40A (42 mg, 59%). HPLC Rt=3.131 min (Chromolith SpeedROD 4.6×50 mm, 10-90% aqueous methanol containing 0.1% TFA, 4 min gradient, monitored at 220 nm), [M+H]=433.

Provenance & Evidence