Aluminium lithium hydride → 3-Bromo-2-methylbenzaldehyde
Reaktionsgleichung
[H-].[Al+3].[Li+].[H-].[H-].[H-].[Br:7][C:8]1[C:9]([CH3:20])=[C:10]([CH:17]=[CH:18][CH:19]=1)[C:11](N(OC)C)=[O:12]>C1COCC1>[Br:7][C:8]1[C:9]([CH3:20])=[C:10]([CH:17]=[CH:18][CH:19]=1)[CH:11]=[O:12]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- -78 °C
Versuchsvorschrift
Lithium aluminum hydride (201 mg, 5.31 mmol) was added in one portion to a −78° C. solution of 3-bromo-N-methoxy-2,N-dimethyl-benzamide ((Example 6: step b) 1.1 g, 4.24 mmol) in THF (25 mL). After stirring for 1 h at −78° C., the hydride reagent was quenched with EtOAc (10 mL), and the solution was slowly poured into a vigorously stirred mixture of citric acid (10%, 30 mL) and EtOAc (50 mL). After separating the layers, the organic layer was washed with NaHCO3 (3×20 mL), water (20 mL), and brine (30 mL). The solution was dried (sodium sulfate) and the solvent was removed in vacuo, giving the title compound (813 mg, 96%) as a colorless oil which was used without further purification. 1H-NMR (CDCl3): δ 10.28 (s, 1H), 7.80 (m, 2H), 7.25 (m, 1H), 2.78 (s, 3H).