反应详情

A solution of 2-(2-fluoro-6-nitrophenyl)ethanol (500 mg, 2.7 mmol) and Et3N (273 mg, 2.7 mmol, dist. over KOH) in THF (6.75 ml, dist. over CaH2) was dropped into a solution, cooled to 0° C., of trichloromethyl chloroformate (641 mg, 3.24 mmol) in THF (6.75 ml, see above) for 5 min. It was stirred for 1 h while cooling in an ice bath and then stirred for 1 h at room temperature. The mixture was filtered over Celite. Rewashing the filter cake with THF and removing the solvent and excess reagent from the pooled filtrates by distillation at 30° C. in a high vacuum yielded 2-(2-fluoro-6-nitrophenyl)ethoxycarbonyl chloride (620 mg, 93%) as a light-brown oil.

1. temperaturewhile cooling in an ice bath
2. stirringstirred for 1 h at room temperature
3. filtrationThe mixture was filtered over Celite
4. customremoving the solvent and excess reagent from the pooled filtrates
5. distillationby distillation at 30° C. in a high vacuum