反应详情

Mix 5-hydroxymethyl-N-methyl-N-propyl-isophthalamic acid ethyl ester (2.8 g, 10 mmol) and Dess-Martin periodinane (5.1 g, 12 mmol) in dichloromethane (50 mL) in an ice-bath. Stir the mixture overnight at room temperature. Dilute with dichloromethane (50 mL) and quench it with premixed sodium thiosulfate (1.5 g) in 5% aqueous sodium bicarbonate solution (50 mL). Filter the slurry through a filtering agent and separate the organic layer. Dry (sodium sulfate), concentrate and purify (silica gel chromatography, eluting with 50:50 ethyl acetate:hexanes) to give the title compound (2.2 g, 79%).

1. customquench it with premixed sodium thiosulfate (1.5 g) in 5% aqueous sodium bicarbonate solution (50 mL)
2. filtrationFilter the slurry through a filtering agent
3. customseparate the organic layer
4. dry with materialDry (sodium sulfate)
5. concentrationconcentrate
6. custompurify
7. wash(silica gel chromatography, eluting with 50:50 ethyl acetate:hexanes)