Benzene, 1-bromo-3-(trifluoromethyl)- → HCID 178447605, Verbindung
Reaktionsgleichung
[C:1]([O-:7])(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[Zn+2:8].C([O-])(=O)C(C)(C)C.Br[C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[CH:18]=1.[Mg]>>[C:1]([O-:7])(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[F:24][C:23]([F:26])([F:25])[C:19]1[CH:18]=[C:17]([Zn+:8])[CH:22]=[CH:21][CH:20]=1Komponenten
4
Reaktionsbedingungen
- Temperatur
- 25 °C
Versuchsvorschrift
2LiCl (2a prepared above; 2.64 g, 7.50 mmol) is placed in a 25 mL Schlenk-flask, dried for 5 min at 400° C. (heat gun) in high vacuum and then dissolved in dry THF (10.0 mL). 1-Bromo-3-(trifluoromethyl)benzene (3d; 1.13 g, 5.00 mmol) and magnesium-turnings (304 mg, 12.5 mmol) are added and the mixture was stirred for 2 h at 25° C. The solution is cannulated to a dry and argon-flushed 50 mL Schlenk-tube via syringe filter and the solvent is removed in vacuo. 3-(Trifluoromethyl)phenylzinc pivalate (1d) is obtained as a grey solid (3.72 g).