反应详情

To a solution (20 ml) of methyl 4-formyl-3-methoxybenzoate (870 mg, 4.48 mmol) in formic acid was added hydroxylamine hydrochloride (405 mg, 5.82 mmol), and the mixture was stirred at room temperature for 1 hr. The temperature was raised to 50° C., and the mixture was further stirred for 24 hrs. Water was added to the reaction mixture, the mixture was neutralized with saturated aqueous sodium hydrogen carbonate solution, and extracted with ethyl acetate. The extract was dried over anhydrous MgSO4, and the solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography and eluted with hexane-ethyl acetate (1:0-7:3, v/v) to give the title compound (780 mg, 91%) as a colorless oil.

1. temperatureThe temperature was raised to 50° C.
2. stirringthe mixture was further stirred for 24 hrs
3. extractionextracted with ethyl acetate
4. dry with materialThe extract was dried over anhydrous MgSO4
5. customthe solvent was evaporated under reduced pressure
6. washeluted with hexane-ethyl acetate (1:0-7:3