Acetic Anhydride → HCID 21454035, compound

Participants

Reaction Steps

At 20° to 25° C, a few drops of concentrated sulfuric acid are added to a solution of 10 parts of 3-phenyl-5-phenylthiopyrazole in 100 parts of acetic anhydride. After 15 hours the solution is concentrated in vacuo and 50 parts of water is added to the residue. There is obtained 10.5 parts (90% of theory) of 1-acetyl-3-phenyl-5-phenylthiopyrazole; m.p.: 83° to 84.5° C (recrystallized from methanol).

Provenance & Evidence