Sulfuric Acid → HCID 178475364, compound

Participants

Reaction Steps

5-(9,10-Dihydro-4,5-dihydroxy-9,10-dioxoanthracen-2-yl)tetrazole (160.0 g) was coated with concentrated sulphuric acid (300 g) and then acetic anhydride (6 liters) added. The mixture was stirred under a nitrogen purge at room temperature for 3 hours. The solid present was isolated by filtration and pulled dry. The isolated solid was then slurried in ice for 10 minutes. The material was re-isolated, washed with water and then pulled dry. The yellow/green solid was then dried in vdcuo at 25° C., m.p. 189°-190° C.

Provenance & Evidence