L. Meng
2012
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0
Influential Citations
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Journal
Chemistry and Adhesion
Abstract
The 2-bromofluorene and 2,7-dibromofluorene were synthesized with using propylene carbonate as solvent and N-bromosuccinimide(NBS) as bromination agent.The influence of reaction temperature,ratio of NBS to fluorene and the feeding mode was investigated.The optimal reaction conditions were obtained as follows: the reaction temperature was 23℃,the ratio of NS to fluorene was 1.1:1 and the stage addition was adopted.The fluorene and propylene carbonate was heated to 60℃,made the fluorene dissolve completely,and then made it drop to the reaction temperature,and fed the NBS through the stage addition.The 2-bromofluorene and 2,7-dibromofluorene were recrystallized from ethanol and acetic acid respectively,and the liquid chromatogram purity of objective products could reach over 99%.