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

Participants

Reaction Conditions

Reaction Steps

7-Fluoro-N-(1-((6-isopropylpyridin-2-yl)methyl)-3-methyl-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide (Example 1, Step A), 0.300 g, 0.678 mmol), (R)-2-(3,4-dimethylpiperazin-1-yl)ethanol (0.536 g, 3.39 mmol), and potassium t-butoxide (0.456 g, 4.07 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 136 mg (33%) of the title compound. MS (APCI), positive scan, m/z=581.1 (M+H). [α]D=−5.3° (c=1.0, CHCl3).

Provenance & Evidence