反应详情

温度

100 °C

To methyl 7-[4-(2-ethoxyethoxy)phenyl]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylate (4.35 g) were added 1,2-dimethoxyethane (87 ml) and 6N hydrochloric acid (43.5 ml), and the mixture was refluxed at 100° C. for 16 hours and cooled to room temperature. The mixture was extracted with ethyl acetate, washed with saturated brine and dried with magnesium sulfate. Under reduced pressure, the solvent was evaporated to give 7-[4-(2-ethoxyethoxy)phenyl]-1,1-dioxo-2,3-dihydro-1-benzothiepine-4-carboxylic acid (3.7 g).

1. temperaturecooled to room temperature
2. extractionThe mixture was extracted with ethyl acetate
3. washwashed with saturated brine
4. dry with materialdried with magnesium sulfate
5. customUnder reduced pressure, the solvent was evaporated