Allyl bromide → Benzene, 1,2-dichloro-3-(2-propenyloxy)-

Beteiligte Stoffe

Reaktionsschritte

A mixture of 2,3-dichlorophenol (35.5 g., 0.22 mole), allyl bromide (29.4 g., 0.24 mole) and potassium carbonate (33 g., 0.24 mole) in dimethylformamide (200 ml.) is vigorously stirred and heated at 55°-60° C. for one hour, poured into ice water, extracted with ether, washed with water and dried over magnesium sulfate. Evaporation of the ether leaves 2,3-dichlorophenyl allyl ether which is subjected to a Claisen rearrangement by heating at 250° C. for ten minutes. Distillation gives 36 g. of 2,3-dichloro-6-allylphenol which boils at 132°-4°/13 mm.

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