反应详情

To the solution of 1-isoquinolonecarboxylic acid (1.73 g, 10 mmol, Aldrich) in anhydrous N,N-dimethylformamide (30 mL) were added N,N-diisopropylethylaime (5.29 g, 40 mmol, Aldrich), O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate (7.6 g, 20 mmol, PerSeptive Biosystems GmbH), N,O-dimethylhyroxylamine hydrochloride (1.8 g, 20 mmol, Aldrich) subsequently at room temperature. The reaction solution was allowed to stir for overnight at room temperature. The N,N-Dimethylformamide was removed via vacuo and the resulting residue was diluted in ethyl acetate (50 mL). After being was washed by saturate aqueous sodium bicarbonate (50 mL) and brine (50 mL), the organic portion was dried over anhydrous magnesium sulfate and concentrated. The title compound was purified by column chromatography (silica gel, ethyl acetate) in form as yellow syrup in 94% yield (2.04 g, 9.4 mmol).

1. customThe N,N-Dimethylformamide was removed via vacuo
2. additionthe resulting residue was diluted in ethyl acetate (50 mL)
3. washAfter being was washed
4. concentrationby saturate aqueous sodium bicarbonate (50 mL) and brine (50 mL)
5. dry with materialthe organic portion was dried over anhydrous magnesium sulfate
6. concentrationconcentrated
7. customThe title compound was purified by column chromatography (silica gel, ethyl acetate) in form as yellow syrup in 94% yield (2.04 g, 9.4 mmol)