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ChemicalBook CAS DataBase List 2,7-Dibromofluorene
16433-88-8

2,7-Dibromofluorene synthesis

9synthesis methods
Fluorene

86-73-7

2,7-Dibromofluorene

16433-88-8

General procedure for the synthesis of 2,7-dibromofluorene from fluorene: Fluorene (1.5 g, 9.0 mmol) was dissolved in carbon tetrachloride (80 mL), followed by the addition of 30 g of copper(II) bromide loaded on aluminum oxide. The reaction mixture was stirred under reflux conditions for 5 hours. Upon completion of the reaction, the solution was cooled to room temperature, filtered to remove solid impurities, and the filter cake was washed with carbon tetrachloride (50 mL). The combined organic phases were dried with anhydrous magnesium sulfate. The solvent was removed by concentration under reduced pressure to give 2.87 g (98% yield) of 2,7-dibromofluorene as a yellow solid. Recrystallization by ethyl acetate/hexane (5:95, v/v) mixed solvent gave pure 2,7-dibromofluorene as light yellow crystals.

-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: aqueous H2SO4; acetic acid
2: benzyl benzoate

References:

Holbro;Tagmann [Helvetica Chimica Acta,1950,vol. 33,p. 2178,2182]

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