Potassium tert-butoxide → (S)-N-(1-((6-cyclopropylpyridin-2-yl)methyl)-3-methyl-1H-indazol-4-yl)-7-(2-(3,4-dimethylpiperazin-1-yl)ethoxy)imidazo[1,2-a]pyridine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

N-(1-((6-cyclopropylpyridin-2-yl)methyl)-3-methyl-1H-indazol-4-yl)-7-fluoroimidazo[1,2-a]pyridine-3-carboxamide (Example 16, Step G; 0.250 g, 0.568 mmol), (S)-2-(3,4-dimethylpiperazin-1-yl)ethanol (0.449 g, 2.84 mmol), and potassium t-butoxide (0.382 g, 3.41 mmol) were combined in t-butanol in a pressure tube. The tube was sealed and warmed to 95° C. for 16 hours, then allowed to cool to ambient temperature. The mixture was diluted with water and extracted with EtOAc. The combined organic extracts were washed with 10% aqueous potassium carbonate, dried over sodium sulfate and concentrated under reduced pressure. Column chromatography (10% MeOH/DCM/0.5% NH4OH) of the crude material followed by trituration with ether gave 102 mg (31%) of the title compound. MS (APCI), positive scan, m/z=579.1 (M+H).

Provenance & Evidence