2-Bromofluorene Chemical Properties | |
Melting point | 112-114 °C(lit.) |
Boiling point | 185 °C135 mm Hg(lit.) |
density | 1.4187 (rough estimate) |
refractive index | 1.6290 (estimate) |
Fp | 185°C/135mm |
solubility | Soluble in chloroform and ethyl acetate. |
form | Slightly Crystalline Powder or Flakes |
color | White to slightly yellow |
BRN | 1946701 |
InChIKey | FXSCJZNMWILAJO-UHFFFAOYSA-N |
CAS DataBase Reference | 1133-80-8(CAS DataBase Reference) |
NIST Chemistry Reference | 9H-Fluorene, 2-bromo-(1133-80-8) |
Safety Information | |
Hazard Codes | Xi |
Risk Statements | 36/37/38 |
Safety Statements | 26-37/39 |
WGK Germany | 3 |
HazardClass | IRRITANT |
2-Bromofluorene Usage And Synthesis | |
Outline | 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%. |
Uses | (1) It can be used as pharmaceutical intermediate, it is also important intermediate in the synthesis of optoelectronic material. (2) By ultrasonic radiation of Barbier-type reaction, 2-bromofluorene is used for the study of aryl bromide (aryl bromides) converts to aryl triethoxysilane (aryltriethoxysilanes). It is also for the preparation of N-carbazole fluorene oligomers end-capped. It can be used as intermediates of OLED materials in industry. |
Chemical Properties | white to slightly yellow crystalline powder |
2-Bromofluorene Preparation Products And Raw materials | |
Preparation Products | 2-Bromo-9,9-dimethylfluorene |
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