Nitric Acid → 2-(1-Chloro-2,2,2-trifluoroethyl)-5,6-dinitro-2-(trifluoromethyl)-1,3-benzodioxole

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Reaction Conditions

Reaction Steps

A mixture of 250 ml of 100% strength by weight nitric acid and 350 ml of concentrated sulphuric acid was added to an initial charge of 352 g of 5-nitro-2-(1-chloro-2,2,2-trifluoroethyl)-2-trifluoromethyl-1,3-benzodioxole from Example 16a. The mixture was stirred at 60° C. for 2 hours. It was cooled, poured into ice-water and extracted with methylene chloride. After washing the mixture with sodium hydrogen carbonate solution, and drying, it was concentrated on a rotary evaporator. The yield was 392 g (91% of theory) and the melting point was 125° C. The NMR spectra showed the following characteristic absorptions: 19F-NMR: -68.5 and -81.0 ppm; 1H-NMR: 4.86 ppm.

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