反应详情

To a suspension of 3-hydroxy-2-nitrobenzoic acid (500 mg) and potassium carbonate (1.13 g) in dimethylformamide (5 ml) was added benzyl bromide (1.12 g) at ambient temperature, and the mixture was stirred overnight. To the reaction mixture-was added water, and extracted with ethyl acetate twice. The organic layers were combined, wished with water and brine, dried over magnesium sulfate and evaporated in vacuo. The residue was purified by silica gel flash chromatography (hexane—ethyl acetate) and crystallized with diisopropyl ether to give benzyl 3-benzyloxy-2-nitrobenzoate (676 mg).

1. extractionextracted with ethyl acetate twice
2. dry with materialdried over magnesium sulfate
3. customevaporated in vacuo
4. customThe residue was purified by silica gel flash chromatography (hexane—ethyl acetate)
5. customcrystallized with diisopropyl ether