Catechol → 2-(2,2,2-Trifluoroethyl)-2-(trifluoromethyl)-1,3-benzodioxole

関与物質

反応条件

反応手順

11 g of pyrocatechol were dissolved in 200 ml of dimethylformamide, and 18 g of 45% strength by weight aqueous sodium hydroxide solution were added. 20 g of 2-chloro-1,1,1,4,4,4-hexafluoro-2-butene were added dropwise to the mixture at 75° C. The mixture was subsequently stirred at 75° C. for 30 minutes. It was then poured onto 500 ml of ice-water and extracted with diethyl ether. The organic phase was washed with water, dried with magnesium sulphate and concentrated. Finally, the product was distilled under a high vacuum. The yield was 15 g (=56%), and the boiling point was 60° C. under 10 mbar. The NMR spectra showed the following characteristic absorptions: 19F-NMR: -59.0 and -84.6 ppm. 1H-NMR: 3.02 ppm.

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