Acetic Anhydride → 1-(2,3,5,6-Tetrafluoro-4-trifluoromethylphenyl)-5-methylcarbonylaminopyrazole
Reaktionsgleichung
[NH2:1][C:2]1[N:6]([C:7]2[C:12]([F:13])=[C:11]([F:14])[C:10]([C:15]([F:18])([F:17])[F:16])=[C:9]([F:19])[C:8]=2[F:20])[N:5]=[CH:4][CH:3]=1.[C:21](OC(=O)C)(=[O:23])[CH3:22]>C(O)(=O)C>[F:20][C:8]1[C:9]([F:19])=[C:10]([C:15]([F:18])([F:17])[F:16])[C:11]([F:14])=[C:12]([F:13])[C:7]=1[N:6]1[C:2]([NH:1][C:21]([CH3:22])=[O:23])=[CH:3][CH:4]=[N:5]1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 7.48 grams (0.0250 mole) of 5-amino-1-(2,3,5,6-tetrafluoro-4-trifluoromethylphenyl)pyrazole, 21.0 mL of glacial acetic acid, and 3.1 mL of acetic anhydride was stirred at room temperature for approximately 18 hours. The reaction mixture was poured into 100 mL of ice-water, forming a white precipitate. This solid was collected by filtration and washed in succession with dilute acetic acid and water. The washed solid was dried to yield 8.1 grams of 1-(2,3,5,6-tetrafluoro-4-trifluoromethylphenyl)-5-methylcarbonylaminopyrazole, m.p. 103°-105° C. The nmr spectrum was consistent with the proposed structure.