5-Nitro-2-(2,2,2-trifluoroethyl)-2-trifluoromethyl-1,3-benzodioxole → 5-Amino-2-(2,2,2-trifluoroethyl)-2-trifluoromethyl-1,3-benzodioxole

Participants

Reaction Steps

57.4 g of the product of Example 27 were dissolved in 400 ml of tetrahydrofuran and hydrogenated with hydrogen at 50 bar for 5 hours at 30° C. in the presence of 4 g of catalyst (palladium-on-charcoal, 10% by weight). After filtration, the solvent was removed and the residue was distilled under high vacuum to give 37 g of product (=63% of theory) with a boiling point of 83° C. at 0.07 mbar. 19F NMR: -59.0 and -84.6 ppm. 1H NMR: 2.98 ppm.

Provenance & Evidence