Dienone–phenol rearrangement of 4-chloro-4-methylcyclohexadienones
Abstract
4-Chloro-4-methyl-, 4-chloro-3,4-dimethyl-, 4-chloro-2,4-dimethyl-, and 4-chloro-2,4,6-trimethylcyclo-hexa-2,4-dienones give the corresponding 3-chloro-4-methylphenols on reaction with trifluoromethane-sulphonic acid.