Thionyl Chloride → 1-methyl-3-(trifluoromethyl)-1H-pyrazole-5-carbonyl chloride
Reaktionsgleichung
[CH3:1][N:2]1[C:6]([C:7](O)=[O:8])=[CH:5][C:4]([C:10]([F:13])([F:12])[F:11])=[N:3]1.S(Cl)([Cl:16])=O>CCCCCC>[CH3:1][N:2]1[C:6]([C:7]([Cl:16])=[O:8])=[CH:5][C:4]([C:10]([F:13])([F:12])[F:11])=[N:3]1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 0.19 g of 1-methyl-3-trifluoromethyl-1H-pyrazole-5-carboxylic acid, 0.15 g of thionyl chloride and 5 ml of hexane was heated under reflux for 2 hours. The reaction mixture was concentrated under reduced pressure to obtain 0.14 g of 1-methyl-3-trifluoromethyl-1H-pyrazole-5-carbonyl chloride. To a mixture of 0.22 g of N-(2-aminobenzoyl)-N′-ethoxycarbonylhydrazine and 10 ml of pyridine was added 0.14 g of the resulting 1-methyl-3-trifluoromethyl-1H-pyrazole-5-carbonyl chloride and the mixture was stirred at room temperature for 2 hours. Water was poured into the reaction mixture, and a deposited precipitates were collected by filtration to obtain 0.23 g of the present compound (3) of the formula: