Isophorone → 4-Bromo-3,5,5-trimethylcyclohex-2-en-1-one

Participants

Reaction Steps

A mixture of isophorone (13.82 g; 0.1 Mole) and N-bromo-succinimide (17.80 g; 0.1 Mole) in the presence of traces of α,α'-azodiisobutyronitrile was refluxed in 500 ml of CCl4 during 15 minutes. 500 ml of petrol-ether (30°-50° C) were then added to the cool reaction mixture and the succinimide thus precipitated was filtered off. By evaporating the volatile components of the clear filtrate, crude 3,5,5-trimethyl-4-bromo-cyclohex-2-en-1-one was obtained.

Provenance & Evidence