Phosphorus tribromide → 2-(Bromomethyl)-1-methyl-4-nitrobenzene

Beteiligte Stoffe

Reaktionsschritte

To a slight suspension of (2-methyl-5-nitrophenyl)methanol (2.0 g, 12 mmol) in DCM (20 ml) in an ice-water bath under nitrogen was a added a solution of phosphorus tribromide (1.13 mL, 12 mmol, Aldrich) in DCM (20 ml). The resulting solution was allowed to warm to ambient temperature and stirred for 45 min. The solution was poured onto a mixture of ice-water (50 ml) and saturated sodium hydrogen carbonate (50 ml). The biphasic mixture was diluted with dichloromethane (50 ml) and the phases separated. The aqueous phase was extracted with dichloromethane (20 ml). The combined organic extracts were dried (MgSO4), filtered and the solvent removed in vacuo to give 2-(bromomethyl)-1-methyl-4-nitrobenzene as a pale yellow solid (1.81 g).

Herkunft & Nachweise