N-bromobutanimide → (4-(Bromomethyl)phenyl)(cyclopropyl)methanone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Dissolve 4-chloro-1-(4-isopropyl-phenyl)-butan-1-one (20 g, 124 mmol) and 2,2′-Azolons (2-methylpropionitrile) (0.5 g) in methylene chloride (100 mL) and cool to 5° C. Add a suspension of N-bromosuccinimide (12 g) in methylene chloride (50 mL) and irradiate with light (150 Watt lamp), maintaining the temperature at 5° C. After 2, 3 and 7 hour time periods, add additional N-bromosuccinimide (6 g, 6 g, 2.8 g) and continue stirring. After 7.5 hours, wash with water (200 mL) and with 0.4M sodium hydrogen carbonate (2×200 mL). Dry (Na2SO4), evaporate the solvent in vacuo and recrystallize (hexane) to give the title compound as a crystalline solid (26.7 g).

Herkunft & Nachweise