2,3-Dichloropyrazine → 4-(3-Chloro-pyrazin-2-ylamino)-1H-pyrazole-3-carboxylic acid (4-fluoro-phenyl)-amide
Reaktionsgleichung
[F:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]([C:11]2[C:15]([NH2:16])=[CH:14][NH:13][N:12]=2)=[O:10])=[CH:4][CH:3]=1.[Cl:17][C:18]1[C:23](Cl)=[N:22][CH:21]=[CH:20][N:19]=1>>[F:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9]([C:11]2[C:15]([NH:16][C:23]3[C:18]([Cl:17])=[N:19][CH:20]=[CH:21][N:22]=3)=[CH:14][NH:13][N:12]=2)=[O:10])=[CH:6][CH:7]=1Komponenten
3
Versuchsvorschrift
A mixture of 4-amino-1H-pyrazole-3-carboxylic acid (4-fluoro-phenyl)-amide (50 mg; 0.23 mmol) and 2,3-dichloropyrazine (140 mg; 0.92 mmol) was heated at 150° C. (50W) for 20 minutes in a CEM Discover™ microwave synthesiser. The crude reaction mixture was purified by flash column chromatography eluting with ethyl acetate/hexane (1:3 then 1:2). Product containing fractions were combined and evaporated to give 15 mg of the title compound as a white solid. (LC/MS: Rt 4.06 M+H]+ 332).
Aufarbeitung
- customThe crude reaction mixture