2-bromo-4'-chloropropiophenone

Hi Someone have expirence with synthesis bromoketone for 4-cmc by bromination in glacial acetic acid. How much time it need to fully react and what propotion is good. I think about for one mole of 4-chloropropiophenone use 1.1 mole of elemental bromine. The addition of bromine will take a 1.5 h...