1,1,2,2-Tetrafluoroethyl iodide → 3-pentafluoroethyl-4-(1,1,2,2-tetrafluoroethyl)-1H-pyrazole

関与物質

反応条件

反応手順

4-Iodo-3-pentafluoroethyl-1H-pyrazole (6.24 g), copper powder (3.81 g), Iodo-1,1,2,2-tetrafluoroethane (9.12 g) and DMF (30 ml) were set in an autoclave and heated and stirred for 8 hours, maintaining the inside temperature of 120-125° C. After cooling to room temperature, the insoluble material was filtered off through Celite and washed with diethyl ether. The filtrate was diluted with water and extracted with diethyl ether. The organic phase was washed with water and dried over sodium sulfate, and concentrated under the reduced pressure. The crude product was distilled under reduced pressure to obtain 3-pentafluoroethyl-4-(1,1,2,2-tetrafluoroethyl)-1H-pyrazole (0.60 g), bp. 125-135° C./20 mbar.

情報源と証拠