2,7-Dibromo-9-fluorenone → 9-(2-Biphenylyl)-2,7-dibromo-9-fluorenol

Participants

Reaction Conditions

Reaction Steps

15.2 g (45 mmol) of 2,7-dibromo-9-fluorenone was put in a 100 mL three-necked flask, and nitrogen substitution was conducted. 40 mL of diethyl ether was added. The Grignard reagent above was transferred into a dropping funnel by a cannula so as not to expose it to the atmosphere, and was added dropwise into the mixture. The mixture was refluxed at 50° C. After the reaction, the solution was washed with water. Then the aqueous layer was extracted with ethyl acetate and combined with the organic layer. The layers were washed with a saturated saline solution, then dried with magnesium sulfate. Filtration and concentration were carried out, and 22 g of 9-(biphenyl-2-yl)-2,7-dibromo-9-fluorenol was obtained as a white solid, in a yield of 90%.

Provenance & Evidence