Imidazole → 1,4-Bis-(4-chlorophenoxy)-3,3-dimethyl-1-(imidazol-1-yl)-butan-2-one

Participants

Reaction Steps

21.6 g (0.05 mol) of crude 1,4-bis-(4-chlorophenoxy)-1-bromo-3,3-dimethyl-butan-2-one were stirred under reflux with 14 g (0.2 mol) of imidazole in 100 ml of acetonitrile for 17 hours. The mixture was then concentrated by distilling off the solvent under reduced pressure. The residue was taken up in 400 ml of methylene chloride and the mixture was extracted by shaking three times with 800 ml of water each time, dried over sodium sulphate and concentrated. The residue was taken up in 100 ml of acetone and 9 g (0.05 mol) of 1,5-naphthalenedisulphonic acid tetrahydrate in 50 ml of acetone were added dropwise. The precipitate formed was filtered off and suspended in 200 ml of methylene chloride. 400 ml of saturated sodium bicarbonate solution were added, the mixture was stirred for 30 minutes and the organic phase was separated off. After distilling off the solvent, 14.1 g (67% of theory) of 1,4-bis-(4-chlorophenoxy)- 3,3-dimethyl-1-(imidazol-1-yl)-butan-2-one were obtained as an oil.

Provenance & Evidence