Реакция #2446096

Уравнение реакции

Potassium hydroxide

THF

dibenzofuran-4-boronic acid

Triphenylphosphine

→

4-Vinyl-dibenzofuran

Выход 42.0%

Растворители

H2O

Ethylacetate

Dichloromethane

Methanol

Условия реакции

Обработка

1. 1
   Другоеequipped with a magnetic stirrer and a reflux condenser
2. 2
   ТемператураThe mixture is refluxed
3. 3
   ТемператураThe reaction mixture is heated to 60° C. internal temperature
4. 4
   Температураcooled down to room temperature
5. 5
   ЭкстракцияThe organic phase is extracted twice with water and once with brine
6. 6
   СушкаThe organic phase is dried over Sodiumsulfate
7. 7
   Другоеthe solvent evaporated
8. 8
   ДругоеThe crude product is purified by column chromatography (Heptane)

Методика

16.09 g (0.259 mol) of Potassium hydroxide (86%) are placed in a 500 ml three necked round bottomed flask equipped with a magnetic stirrer and a reflux condenser. 200 ml of THF and 6.5 ml of Dichloromethane are added. The mixture is refluxed. After 1 hour the mixture is cooled to room temperature. A solution of 8 g (37.74 mmol) dibenzofuran-4-boronic acid, 0.8 g (3.02 mmol) of Triphenylphosphine, 339 mg (0.7 mmol) of Palladium (II) acetate and 200 ml of Methanol are added. The reaction mixture is heated to 60° C. internal temperature. After 2 hours the reaction is complete and cooled down to room temperature. The mixture is diluted with H2O and Ethylacetate. The organic phase is extracted twice with water and once with brine. The organic phase is dried over Sodiumsulfate and the solvent evaporated. The crude product is purified by column chromatography (Heptane). 4-Vinyl-dibenzofuran is isolated in 42% yield.

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