Reaktion #1447125

Reaktionsgleichung

1-(2-aminophenyl)-3-methylbutan-1-one

5-fluoro-1,3-dimethyl-1H-pyrazole-4-carbonyl chloride

triethylamine

→

2-(3-methylbutyryl)phenyl-5-fluoro-1,3-dimethyl-1H-pyrazole-4-carboxamide

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationfiltered through silica gel
2. 2
   Einengenconcentrated

Vorschrift

At room temperature, 355.0 mg (2.0 mmol) of 1-(2-aminophenyl)-3-methylbutan-1-one are added to a solution comprising 388.5 mg (2.2 mmol) of 5-fluoro-1,3-dimethyl-1H-pyrazole-4-carbonyl chloride and 0.45 ml (3.2 mmol) of triethylamine in 20 ml of tetrahydrofuran. The reaction mixture is stirred at 60° C. for 1.5 h, filtered through silica gel and concentrated. Column chromatography (cyclohexane/ethyl acetate: 3/1) gives 577.7 mg (1.8 mmol, 88% of theory) of N-[2-(3-methylbutyryl)phenyl-5-fluoro-1,3-dimethyl-1H-pyrazole-4-carboxamide of logP (pH=2.3)=3.42.

Quelle