Nitric Acid → HCID 12925978, compound

Participants

Reaction Steps

To a solution of 0.408 g. of 4',5'-dihydrospiro[benzo[b]furan-2(3H), 3'(2'H)-furan]-2',3-dione in 3 ml. of concentrated sulfuric acid was added a mixture of 0.35 ml. of nitric acid (d=1.42) and 0.36 ml. of concentrated sulfuric acid, dropwise under ice-cooling, and the mixture was stirred for 2 hours. The reaction mixture was poured into ice-water and the precipitated crystals were collected by filtration, washed with water, dried and recrystallized from ethyl acetate. By the above procedure there was obtained colorless needles of 4',5'-dihydro-5-nitrospiro[benzo[b]furan-2(3H),3'(2'H)-furan]-2',3-dione. m.p. 199°-200° C.

Provenance & Evidence