反应详情

(7-chloro-3-oxo-1,3-dihydroisobenzofuran-1-yl)triphenylphosphonium bromide (101) (9.3 g, 21.64 mmol) and 2-fluoro-5-formylbenzonitrile (3.55 g, 23.80 mmol) were dissolved in DCM (60 mL), to this was added triethylamine (3.92 mL, 28.13 mmol) and the reaction was stirred overnight. The reaction mixture was evaporated to afford a brown solid. To this was added water (40 mL), EtOH (40 mL) and DMF (4 mL). Hydrazine hydrate (10.83 g, 216.35 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 compound as a yellow solid (6.10 g, 90%), which was used without further purification; 1H NMR (400.132 MHz, DMSO) δ 4.64 (2H, s), 7.44 (1H, t), 7.63-7.59 (1H, m), 7.78 (1H, dd), 7.81 (1H, t), 7.98 (1H, dd), 8.33 (1H, dd); m/z (LC-MS, ESI+), RT=2.17 (M−H 312).

1. customThe reaction mixture was evaporated
2. customto afford a brown 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