Lithium Hexamethyldisilazide → N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(1-methyl-1H-pyrazol-5-yl)imidazo[1,2-a]pyridine-3-carboxamide

Participants

Reaction Steps

To a solution of 3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-amine (46.7 mg, 0.185 mmol) in anhydrous THF (2 ml) was added under a nitrogen atmosphere at ambient temperature lithium bis(trimethylsilyl)amide (1.0 M in THF, 0.38 mL). The resulting mixture was stirred at ambient temperature for 10 minutes, then added dropwise to a chilled (ice-water bath) solution of methyl 7-(1-methyl-1H-pyrazol-5-yl)imidazo[1,2-a]pyridine-3-carboxylate (47.4 mg, 0.185 mmol) in anhydrous THF (2 mL). The cold bath was removed, and the reaction mixture was allowed to warm to ambient temperature, and quenched with water. The resulting suspension was extracted with DCM. The combined organic extracts were dried over anhydrous sodium sulfate and concentrated to afford the dried product. The crude product was subjected to preparative thin-layer chromatography on silica with 8% MeOH/DCM as eluent to afford 45.7 mg of pure, desired product as a yellow-brown solid. MS (ES+APCI) m/z=477 (M+H) detected.

Provenance & Evidence