Triethylamine → (Z)-7-(2-ethoxyvinyl)-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

A flask was charged with 7-bromo-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide (Example 50, Steps A-B; 100 mg, 0.21 mmol), tri-O-tolylphosphine (12.8 mg, 0.042 mmol) and tris(dibenzylideneacetone)dipalladium (19.3 mg, 0.021 mmol). To the flask was added DMF (3 mL), followed by (Z)-tributyl(2-ethoxyvinyl)stannane (114 mg, 0.316 mmol) and triethylamine (0.04 mL, 0.30 mmol). The reaction mixture was degassed under nitrogen, and stirred at 100° C. for 10 hours. The reaction mixture was cooled, diluted with water, and extracted with DCM and EtOAc. The combined organic extracts were dried over anhydrous sodium sulfate and concentrated. The crude product was subjected to preparative thin-layer chromatography on silica with 5% MeOH/DCM as eluent to afford 82.8 mg of product as a yellow solid.

Provenance & Evidence