反应详情

In a 2 L Erlenmeyer flask, 140 g (2.5 mol) of KOH was dissolved in 250 mL of water, and the solution was diluted with 250 mL of methanol and 10 mL of tetramethylammoniumhydroxide. Then, 110 g (0.50 mol) of 4-(t-butyloxycarbonyloxy)styrene (tBOCstyrene) was added and the mixture heated to boiling. After 5-8 minutes, the mixture cleared to a yellow solution and was cooled by the addition of 500 mL of a 1/1 ice-water mixture. This mixture was washed with 250 mL of dichloromethane and 250 mL of ethyl ether. The pH of the aqueous solution was reduced to 11-12 by the addition of dry ice, resulting in the formation of a cream colored precipitate (4-vinylphenol) in a yellow solution.

1. temperaturethe mixture heated to boiling
2. washThis mixture was washed with 250 mL of dichloromethane and 250 mL of ethyl ether
3. additionThe pH of the aqueous solution was reduced to 11-12 by the addition of dry ice