反应详情

To a solution of 5-methanesulfonyl-furan-2-carboxylic acid (1.1 g, 5.8 mmol) in DMF (20 mL) was added HBTU (2.8 g, 8.7 mmol) and DIPEA (3.2 mL, 17.4 mmol). After stirring for 10 minutes, N,O-dimethylhydroxylamine hydrochloride (0.85 g, 0.71 mmol) was added. After 18 hours, the mixture was diluted with saturated aqueous sodium bicarbonate solution (50 mL) and extracted with ethyl acetate (4×25 mL). The combined organic layers were washed with brine (30 mL), dried over sodium sulfate, filtered and concentrated in vacuo to afford 5-methanesulfonyl-furan-2-carboxylic acid methoxy-methyl-amide.

1. waitAfter 18 hours
2. extractionextracted with ethyl acetate (4×25 mL)
3. washThe combined organic layers were washed with brine (30 mL)
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo