Bromine → 3,3-Bis-fluoromethyl-1-bromo-1-(4-chlorophenoxy)-butan-2-one

Participants

Reaction Steps

166 g (0.632 mol) of 3,3-bisfluoromethyl-1-(4-chlorophenoxy)-butan-2-one were dissolved in 500 ml of methylene chloride, and 100 g (0.625 mol) of bromine were added dropwise at 20° to 30° C., while stirring and cooling. The mixture was subsequently stirred at 20° C. for 2 hours. After distilling off the solvent in vacuo, the residue was crystallized from petroleum ether. 190 g (88% of theory) of 3,3-bisfluoromethyl-1-bromo-1-(4-chlorophenoxy)-butan-2-one of melting point 54°-55° C. were obtained. ##STR75##

Provenance & Evidence