Hydrochloric Acid → 4-(Bromomethyl)-1-naphthaldehyde

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-(bromomethyl)-1-naphthonitrile (8 g, 33 mmol) in toluene (100 mL) at 0° C. was added dropwise DIBAL-H (1.0 M solution in toluene; 43 mL), and the reaction mixture was stirred at 0° C. for 1 h. 3 N HCl in water (50 mL) was added to the mixture until it became a white slurry and then additional 1 N HCl (20 mL) was added. The organic layer was collected and the aqueous layer was extracted with EtOAc (3×100 mL). The combined organic layer was dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; 5% EtOAc in petroleum ether) afforded the title compound as a white solid (7 g, 88%): mp 115-116° C.; 1H NMR (400 MHz, CDCl3) δ 10.41 (s, 1H), 9.35 (m, 1H), 8.22 (m, 1H), 7.90 (d, J=8.0 Hz, 1H), 7.75 (m, 3H), 4.95 (s, 2H); ESIMS m/z 248.88 ([M+H]+).

Provenance & Evidence