Hydrogen Bromide → HCID 18996990, compound

Participants

Reaction Steps

2-Amino-9,10-dihydro-4,5-dimethoxy-9,10-dioxoanthracene (1 g) was suspended in a 48% solution of hydrobromic acid in water (30 ml) and heated to reflux under an atmosphere of nitrogen for sixty hours. The red suspension turned brown. The mixture was poured into water (100 ml), creating a red precipitate which was collected by filtration. Drying in vacuo over silica gel yielded 2-amino-9,10-dihydro-4,5-dihydroxy-9,10-dioxoanthracene as a dark red powder, m.p. 250°-252° C.

Provenance & Evidence