Borane → (2-Bromo-5-methoxyphenyl)methanol
Reaktionsgleichung
[Br:1][C:2]1[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[CH:7][C:3]=1[C:4](O)=[O:5].B>C1COCC1>[Br:1][C:2]1[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[CH:7][C:3]=1[CH2:4][OH:5]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
Under a nitrogen atmosphere, 25 g (0.11 mol) of 2-bromo-5-methoxybenzoic acid was dissolved in 100 mL of anhydrous THF. 140 mL (0.14 mol) of borane (1 M in THF) was added to this solution over a period of 1 hour. The reaction was allowed to stir and was carefully quenched with 1:1 THF: saturated K2CO3. Ether was added and the aqueous and organic layers were separated. The aqueous layer was extrated again with ether (2×100 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo to afford 23.0 g (96%) of 2-bromo-5-methoxybenzyl alcohol (13).