Water → HCID 10426318, compound

Participants

Reaction Steps

To a cold (-5° C.) suspension of 4.45 g (16.00 mmol) of compound (19) in 25 ml acetonitrile was added dropwise a suspension of 2.60 g (16.64 mmol) of nitronium tetrafluoroborate in 5 ml of acetonitrile. After ten minutes, the homogenous, light-yellow reaction mixture was poured into water and extracted twice with ethyl acetate. The combined organic layers were washed with saturated NaCl solution and then dried over anhydrous MgSO4. The solvent was then removed under reduced pressure, and the crude residue was recrystallized from methanol to give N-(5-bromo-8-methyl-4-nitro-naphthalen-1-yl)-acetamide (20) as a light-yellow solid, m.p. 216°-217° C. Another 0.80 g of compound (20) was obtained from the concentrated mother liquors after flash chromatography on silica, eluting hexanes:ethyl acetate (1:1). The overall yield was 2.00 g (39%).

Provenance & Evidence