反应详情

5-norbornen-2-ylmethyl methacrylate monomer was prepared in a flask fitted with a vertical condenser with water at 75° C circulating through the jacket, attached at the top to a downwards cold water-cooled condenser. There were refluxed for 2 hours 372 grams (3.0 moles) of 5-norbornen -2-methanol, 450 grams (4.5 moles) of methyl methacrylate, 526 grams of N,N-dimethylformamide, 28.8 grams of hydroquinone, and 8.1 grams (0.15 mole) of sodium methoxide. A total of 252 ml of distillate was collected (theoretical methanol equals 121 ml.). The flask contents were cooled, diluted with ether, and washed with water, excess dilute hydrochloric acid, water, 5% aqueous sodium hydroxide until the washes were colorless, and again with water. The ether solution was dried with anhydrous sodium sulfate, 11.5 grams of p-(p-tolylsulfonyl-amido) diphenylamine were added, and the ether was removed in a rotary evaporator at 60° C and about 15 mm pressure. To the residual oil 0.58 gram of hydroquinone was added and the product was distilled through a Vigreux column to give 431 grams of product having a boiling point of 770 C/1.4 mm, nD20 = 1.4848. The monomer was then passed through a column of activated sodium aluminum silicate.

1. temperaturecooled condenser
2. distillationA total of 252 ml of distillate was collected (theoretical methanol equals 121 ml.)
3. temperatureThe flask contents were cooled
4. additiondiluted with ether
5. washwashed with water, excess dilute hydrochloric acid, water, 5% aqueous sodium hydroxide until the washes
6. dry with materialThe ether solution was dried with anhydrous sodium sulfate, 11.5 grams of p-(p-tolylsulfonyl-amido) diphenylamine
7. additionwere added
8. customthe ether was removed in a rotary evaporator at 60° C
9. additionTo the residual oil 0.58 gram of hydroquinone was added
10. distillationthe product was distilled through a Vigreux column