Dimethylformamide → 5-Propoxypyridine-2-carboxaldehyde

Participants

Reaction Conditions

Reaction Steps

A mixture comprising 2-iodo-5-propoxypyridine (0.27 g, 1 mmol) and THF (10 mL) was cooled to -78° C. and then tert-butyl lithium (1.3 mL, 1.7 M in pentane, 2.1 mmol) was added dropwise to give an orange slurry. The slurry was cooled to -78° C. and stirred for 5 minutes and then anhydrous N,N-dimethylformamide (0.4 mL, 5 mmol) was added dropwise. The mixture was allowed to warm to ambient temperature, stirred 20 minutes and then poured into a mixture comprising ethyl acetate and water. The mixture was washed with water, dried (MgSO4), filtered and concentrated under reduced pressure to provide 5-propoxypyridine-2-carboxaldehyde (0.2 g, 1.3 mmol) as a dark oil. 1H-NMR (300 Mhz, CD3OD): 1.1 (t, 3H), 1.9 (m, 2H), 4.1 (t, 2H), 7.5 (m, 2H), 8.4 (m, 1H), 10.5 (s, 2H); MS (CI); Calculated for C9H11NO2, 165.2, Found (MH+): 166.

Provenance & Evidence