反应详情

温度

140 °C

840 g of cyclopentene are added dropwise to 648 g of p-cresol and 60 g of an acid-activated fuller's earth at 140° C. Next the mixture is stirred at 140° C for 15 h. After having removed the catalyst by filtration the mixture is fractionated. In the boiling range of 153°-156° C 540 g of 2,6-dicyclopentyl-4-methylphenol are obtained (0.8 mm Hg) and between 167°-170° C 422 g of a fraction (0.8 mm Hg) which is recrystallised from petroleum ether. Yield: 360 g of 2,5-dicyclopentyl-4-methylphenol. Melting point: 78° C.

1. customAfter having removed the catalyst
2. filtrationby filtration the mixture