反应详情

温度

90 °C

A degassed solution of 2-(3-bromo-phenyl)-[1,3]dioxolane (3.46 ml, 22.6 mmol) in dimethoxyethane (60 ml) was added into a tube which has been charged with a mixture of 2-isopropenyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (3.8 g, 22.6 mmol) and an aqueous solution of sodium carbonate (1M, 20 ml); tetrakis(triphenylphosphine)palladium(0) (0.266 g) is then added, the tube is sealed and heated to 90° C. overnight. After cooling of the reaction mixture, water (20 ml) was added, the aqueous layer separated and extracted with dichloromethane (3×20 ml). The combined organic layers were dried over sodium sulphate and evaporated. The crude product was purified by chromatography on silica gel using cyclohexane as the eluent. There were obtained 2.85 g (68% of theory) of the 2-(3-isopropenyl-phenyl)-[1,3]dioxolane.

1. customthe tube is sealed
2. additionwas added
3. customthe aqueous layer separated
4. extractionextracted with dichloromethane (3×20 ml)
5. dry with materialThe combined organic layers were dried over sodium sulphate
6. customevaporated
7. customThe crude product was purified by chromatography on silica gel