Acetic Acid → HCID 178526512, compound

Participants

Reaction Steps

To a mixture of 3.4 mmol of 2,8-dihydroxy4,6-dimethoxy-5-(p-nitrophenyl)-5H-pyrano[2,3-d:6,5-d′]dipyrimidine, 10 ml of acetic acid, and 10 ml of acetic anhydride there are added 8-12 drops of concentrated sulfuric acid. The mixture is stirred while being boiled for 8-10 hours, and then poured into 150 ml of cold water and left over night. Separation and purification of the resulting substances is as described above. Yield 25-30%

Provenance & Evidence