反应详情

2-Chloro-6-(4-pyridyl)benzaldoxime (85 mg, 0.37 mmol), 2,2-dichloro-N-(3-ethynylphenyl) acetamide (78 mg, 0.34 mmol), chloramine-T hydrate (100 mg, 0.44 mmol) and ethanol (2 mL) were combined in a microwave vial and sealed with a crimp seal. The mixture was microwaved at 100° C. for 600 seconds. The resulting mixture was concentrated under reduced pressure and taken up in ethyl acetate. This organic solution was washed with ice-cold 1N sodium hydroxide and brine. The organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel, eluting with 98:2 methylene chloride:methanol to provide compound number 684, 2,2-dichloro-N-[2-[3-(2-chloro-6-(4-pyridyl)phenyl)-5-isoxazoyl]phenyl]acetamide (20 mg, 13% yield) as a light yellow solid. NMR (300 MHz, CDCl3): 8.5 (m, 2H), 8.25 (broad s, 1H), 8.0 (m, 1H), 7.8 (m, 1H), 7.7–7.4 (m, 5H), 7.3 (m, 2H), 6.5 (s, 1H), 6.05 ppm (s, 1H).

1. customsealed with a crimp
2. customseal
3. customThe mixture was microwaved at 100° C. for 600 seconds
4. concentrationThe resulting mixture was concentrated under reduced pressure
5. washThis organic solution was washed with ice-cold 1N sodium hydroxide and brine
6. dry with materialThe organic layer was dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by flash column chromatography on silica gel
10. washeluting with 98:2 methylene chloride