p-Toluenesulfonic acid → 2-Ethylideneadamantane

Participants

Reaction Steps

70 g of 2-ethyl-2-adamantanol was dissolved in toluene, 1 g of p-toluenesulfonic acid was added, and water was removed by distillation by use of a Dean and Stark dehydrator under heating so as to obtain 2-ethylideneadamantane. To 50 g of the obtained 2-ethylideneadamantane, 500 g of methacrylic acid and 0.1 ml of concentrated sulphuric acid were added, and the resulting mixture was heated at 80° C. for 5 hours. After hexane was added to the obtained reaction mixture, the mixture was washed with water, a 5% sodium hydroxide solution, and water in turn, and it was confirmed that the pH of an aqueous phase became 8. After the washed organic phase was concentrated, unreacted 2-ethylideneadamantane was partially removed by sublimation so as to obtain crude 2-ethyl-2-adamantyl methacrylate containing 80% by weight of 2-ethyl-2-adamantyl methacrylate.

Provenance & Evidence