2-Bromofluorene suppliers

2-Bromofluorene

CAS:: 1133-80-8

MF:: C13H9Br

MW:: 245.11

SecurityInformation

Symbol(GHS) ：: GHS07

Signal word ：: Warning

Hazard statements ：: H315-H319-H335

Precautionary statements ：: P261-P264-P271-P280-P302+P352-P305+P351+P338

Hazard Codes ：: Xi

Risk Statements ：: 36/37/38

Safety Statements ：: 26-37/39

WGK Germany ：: 3

HazardClass ：: IRRITANT

HS Code ：: 29039990

Use：: 2-bromofluorene is often used as synthetic intermediate of the OLED material in industry, by the reaction of barbier-type ultrasonic radiation, 2-bromofluorene is also used to study the conversion of aryl bromides to aryl triethoxy silane. Lab Preparation Methods: propylene carbonate is used as solvent, N-bromosuccinimide (NBS) is used as brominated reagent to carry bromination reaction of fluorine, and this reaction can synthesize 2-bromofluorene and 2,7-dibromofluorene. By the investigation of reaction temperature, NBS amount, the adding methods, the optimal reaction conditions for the synthesis of 2-bromofluorene is confirmed. The optimal reaction conditions are: reaction temperature is 23℃, the molar ratio of NBS with fluorine is 1.1:1, NBS is added by stage addition. First fluorene and propylene carbonate is preheated to 60℃, so fluorine is all dissolved, and then it drops to the reaction temperature, NBS is added by stage addition. 2-bromofluorene and 2,7-dibromofluorene recrystallizes with ethanol and acetic acid respectively, the purity of target product of liquid chromatography can reach more than 99%.

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Puyang Huicheng Electronic Materials Co., Ltd.