反应详情

A RBF was charged with perfluorophenyl 1-(4-bromo-2-methoxyphenyl)-2-oxo-1,2-dihydroquinoline-6-sulfonate (1.070 g, 1.857 mmol), isoxazol-3-amine (0.158 ml, 2.135 mmol) and THF (12.38 ml) to give a clear solution. The flask was cooled in an ice-water bath for 10 min, then lithium bis(trimethylsilyl)amide (1M in THF) (3.90 ml, 3.90 mmol) was added dropwise. After 10 min, the mixture was diluted with EtOAc and washed with 1N aq. HCl. The aq. layer was washed with EtOAc. The combined organic extracts were dried over sodium sulfate, filtered; and concentrated. The residue was purified by chromatography (50-g SNAP Ultra column, 25-g silica gel loading column, 0-5% MeOH/DCM) to give 1-(4-bromo-2-methoxyphenyl)-N-(isoxazol-3-yl)-2-oxo-1,2-dihydroquinoline-6-sulfonamide (0.867 g) as a tan foam that was ca. 90% pure. m/z (ESI) 476.1 (M+H)+.

1. customto give a clear solution
2. temperatureThe flask was cooled in an ice-water bath for 10 min
3. washwashed with 1N aq. HCl
4. washThe aq. layer was washed with EtOAc
5. dry with materialThe combined organic extracts were dried over sodium sulfate
6. filtrationfiltered
7. concentrationand concentrated
8. customThe residue was purified by chromatography (50-g SNAP Ultra column, 25-g silica gel loading column, 0-5% MeOH/DCM)