反应详情

温度

80 °C

To a solution of 35.5 g of methyl 4-hydroxybenzoate and 50.2 g of methyl 2-chloro-5-nitrobenzoate dissolved in 500 ml of N,N-dimethylformamide (DMF), was added 48.4 g of anhydrous potassium carbonate, and the mixture was stirred for 3 hours at 80° C. Water was added to the reaction mixture and the whole was extracted with ethyl acetate. The organic layer was washed with saturated brine, and was dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The obtained crude product was recrystallized from methanol to yield 67.7 g of methyl 2-(4-methoxycarbonylphenoxy)-5-nitrobenzoate (melting point: 103-105° C.) (Reaction Scheme (24) described below).

1. extractionthe whole was extracted with ethyl acetate
2. washThe organic layer was washed with saturated brine
3. dry with materialwas dried over anhydrous magnesium sulfate
4. customThe solvent was removed under reduced pressure
5. customThe obtained crude product
6. customwas recrystallized from methanol