反应详情

To 4-[4-(5-{2-[(methylsulphonyl)oxy]phenyl}-4,5-dihydro-1,2-oxazol-3-yl)-1,3-thiazol-2-yl]piperidinium chloride (110 mg) in dimethylformamide (6 ml) were added, under argon, glycolic acid (19 mg), diisopropylethylamine (32 mg) and O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TBTU, 159 mg). Then diisopropylethylamine (64 mg) was added once again to the reaction mixture. The reaction mixture was stirred at room temperature for 1 h. Then ice-cold sodium hydrogencarbonate solution was added thereto, the mixture was filtered, and the aqueous phase was removed and extracted with dichloromethane. The combined organic phases were dried over magnesium sulphate and concentrated. Purification by column chromatography gave 2-{3-[2-(1-glycoloylpiperidin-4-yl)-1,3-thiazol-4-yl]-4,5-dihydro-1,2-oxazol-5-yl}phenyl methanesulphonate (15 mg, 12%).

1. additionThen ice-cold sodium hydrogencarbonate solution was added
2. filtrationthe mixture was filtered
3. customthe aqueous phase was removed
4. extractionextracted with dichloromethane
5. dry with materialThe combined organic phases were dried over magnesium sulphate
6. concentrationconcentrated
7. customPurification by column chromatography