2-Ethenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane → HCID 86710110, compound

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Reaction Conditions

Reaction Steps

3-(4,4-Difluorocyclohexylmethyl)-6-iodo-2-trifluoromethylimidazo[1,2-a]pyridine-7-carbonitrile (20.0 mg, 0.0430 mmol) obtained in step 2 was dissolved in 1,2-dichloromethane (0.60 mL), and the solution was stirred at 60° C. for 1 hour after adding 4,4,5,5-tetramethyl-2-vinyl-1,3,2-dioxaborolane (24.0 mg, 0.153 mmol), tetrakis(triphenylphosphine)palladium(0) (4.93 mg, 0.00426 mmol), and water (0.2 mL). The reaction mixture was filtered through Celite (registered trademark), and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=90/10→50/50) to give 3-(4,4-difluorocyclohexylmethyl)-2-trifluoromethyl-6-vinylimidazo[1,2-a]pyridine-7-carbonitrile (11.0 mg, yield 70%).

Provenance & Evidence