Nitric Acid → 1-(6,7-dichloro-8-nitro-2,3-dihydro-1,4-benzodioxin-5-yl)-1-ethanone

Participants

Reaction Steps

5',6'-Dichloro-2',3'-ethylenedioxyacetophenone (8.5 g, 0.0344 miol) was added in portions to 34.5 mL of stirring fuming nitric acid at a rate such that the temperature of the reaction mixture remained below 10° C. The mixture was stirred for an additional 10 minutes at 5 C. and then poured onto 250 g of crushed ice giving yellow precipitate. The precipitate was isolated by filtration and washed with water. Drying gave 5',6'-dichloro-2',3'-ethylenedioxy-4'-nitroacetophenone (8.9 g, 0.0341 mol), m.p. 181°-182° C.

Provenance & Evidence