Dimethylformamide → 6-Bromo-3-pyridinecarboxaldehyde

Participants

Reaction Conditions

Reaction Steps

2,5-Dibromopyridine 9.48 g (40 mmol) was dissolved in 60 mL of THF and 150 mL of anhydrous ether. After the solution was cooled to −78° C., 16 mL of n-butyllithium (2.5 M, 40 mmol) was slowly dropped through a syringe in 30 min. After being stirred at −78° C. for 30 minutes, N,N-dimethylformamide (3.5 g, 48 mmol) was added. The reaction mixture was warmed up to room temperature during two hours and then quenched by addition of 10 ml water. The mixture was extracted twice using EtOAc. The combined extracts were dried and concentrated. After flash column using 30-40% EtOAc in hexane, 2.80 g white solid was obtained (28% yield), MS: (M+H)+ 186.0, 188.0.

Provenance & Evidence