Hydrochloric Acid → 1-(4-Bromo-2,5-difluorophenyl)ethan-1-one

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred mixture of 20 g 2,5-difluorobromobenzene and 35,2 g aluminum chloride under nitrogen at 60° C. was added dropwise 11.2 ml acetyl chloride. The reaction mixture was stirred at 95° C. for 90 min. and then poured over 250 g ice followed by 17 ml concentrated hydrochloric acid. The aqueous mixture was extracted with ether, and the extracts washed with sodium chloride solution and concentrated. The residue (23.6 g) was distilled in vacuo to give 18.4 g (76%) 4-bromo-2,5-difluoroacetophenone, b.p. 65° C. (0.1 mm).

Herkunft & Nachweise