p-Toluenesulfonic acid → 2-Cyclopentyl-3,5-xylenol

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Reaction Steps

102 g of cyclopentene are added dropwise to 244 g of 3,5-dimethylphenol and 20 g of p-toluene sulphonic acid at 120° C. The mixture is then stirred at this temperature for 2 h. After removal of the catalyst by washing with sodium hydrogen carbonate solution the mixture is fractionated. At boiling point 104° C (0.5 mm Hg) 90 g of 3,5-dimethyl-2-cyclopentylphenol are obtained.

Provenance & Evidence