反应详情

(7-methoxy-3-oxo-1,3-dihydroisobenzofuran-1-yl)triphenylphosphonium bromide (123) (3.5 g, 6.93 mmol) and 2-fluoro-5-formylbenzonitrile (1.033 g, 6.93 mmol) were dissolved DCM (30 mL), to this was added triethylamine (1.255 mL, 9.00 mmol) and the reaction was stirred overnight. The solvent was removed to afford a white solid. To this was added water (20 mL), EtOH (20 mL) and DMF (2 mL). Hydrazine hydrate (3.36 mL, 69.26 mmol) was added and the reaction was heated at reflux overnight. The reaction was cooled and the precipitate was collected by filtration, washed with EtOH (25 mL) and air dried to afford the desired material as a white solid (2.70 g, >100%), which was used without further purification; 1H NMR (400.132 MHz, DMSO) δ 3.79 (3H, s), 4.40 (2H, s), 7.31-7.39 (1H, m), 7.47-7.59 (2H, m), 7.66-7.73 (2H, m), 7.78-7.82 (1H, m), 12.40-12.62 (1H, m).

1. customThe solvent was removed
2. customto afford a white solid
3. temperaturethe reaction was heated
4. temperatureat reflux overnight
5. temperatureThe reaction was cooled
6. filtrationthe precipitate was collected by filtration
7. washwashed with EtOH (25 mL) and air
8. customdried