Nitric Acid → 1-Chloro-4,5-difluoro-2-nitrobenzene
Reaktionsgleichung
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[C:4]([F:9])[CH:3]=1.OS(O)(=O)=O.[N+:15]([O-])([OH:17])=[O:16]>>[Cl:1][C:2]1[CH:3]=[C:4]([F:9])[C:5]([F:8])=[CH:6][C:7]=1[N+:15]([O-:17])=[O:16]Komponenten
4
Versuchsvorschrift
To a flask was added 4-chloro-1,2-difluorobenzene (8.97 g, 60.4 mmol), followed by adding 98% con. H2SO4(16.1 mL, 302 mmol) and 65% con. HNO3 (5.0 mL, 66.4 mmol) at 0° C. The mixture was stirred at rt for 5 hours, then poured into ice water (500 mL). The resulted mixture was extracted with ethyl acetate (200 mL×3). The combined organic phase were washed with saturated aqueous NaHCO3 solution (200 mL×2) and brine (200 mL), dried over anhydrous Na2SO4, and concentrated in vacuo to give the title compound as yellow liquid (11.31 g, 96.7%).