Organic compound and organic electroluminescent device comprising the organic compound
An organic compound and organic technology, applied in the field of phosphorescent organic electroluminescence devices, can solve the problems of low current density and poor thermal stability, and achieve the effect of improving the efficiency of components
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Embodiment 1
[0041] Synthesis of compound Ds1
[0042]2,5-dibromo-p-xylene (2,5-dibromo-p-xylene) (2.64g, 10mmol) and potassium permanganate (KMnO 4 , 10.0g, 50mmol) into a 500mL double-neck round bottom flask, add pyridine (pyridine, 20mL) and water (10mL), and heat to reflux. Aqueous potassium permanganate solution (5 g dissolved in 10 mL of water) was added every 30 minutes for a total of four additions. After continuing to reflux overnight, filter while hot with celite, concentrate the filtrate under reduced pressure, add aqueous hydrochloric acid (10%, 10 mL), and extract with ethyl acetate, take the organic layer, and dehydrate with anhydrous magnesium sulfate , filtered and dried to obtain compound 1 as a white powder solid product with a yield of 81%. The reaction formula of the above reaction is as follows:
[0043]
[0044] Next, compound 1 (8.92g, 27.5mmol) was put into a 250mL single-neck round bottom flask, ethanol (100mL) and concentrated sulfuric acid (5mL) were added ...
Embodiment 2
[0055] Synthesis of Compound Ds2
[0056] Take compound 7 (5.72g, 22.0mmol), compound 2 (3.80g, 10.0mmol) and Pd(PPh 3 ) 4 (693mg, 0.6mmol) is put into 250mL two-neck bottle, add K 2 CO 3 (2M in H 2 O, 20 mL) and toluene (100 mL), heated to reflux for 18 hours. Extract with dichloromethane, and wash the organic layer with saturated brine, take the organic layer, remove water with anhydrous magnesium sulfate, filter and concentrate the filtrate under reduced pressure, and then purify by column chromatography (SiO 2 , EA / Hexane=1 / 8) to obtain compound 8 as a white solid with a yield of 72%. The reaction formula of the above reaction is as follows:
[0057]
[0058] Get 100ml two-necked bottle and insert compound 8 (4.87g, 10.0mmol), add H 2 SO 4 (30ml) is the solvent and starts to heat and reflux. After reacting for 3 hours, the solution is returned to room temperature, and then extracted with dichloromethane. The extracted organic liquid is washed with saturated sali...
Embodiment 3
[0073] Synthesis of Compound Ds3
[0074]Compound 11 (4.39 g, 12.5 mmole) was put into a 500 ml double-necked round-bottom bottle, pumped nitrogen several times in the vacuum system, then added dry and dehydrated tetrahydrofuran (THF) with a syringe, and cooled to -78°C. At -78°C, n-BuLi (12.0mmol, 0.77g, 7.5mL (1.6M inhexane)) was added dropwise, and stirring was continued for 1 hour after the drop was completed. Also at -78°C, compound 9 (1.97 g, 5.0 mmole) was added, stirred overnight, and allowed to return to room temperature naturally. Then extracted with ethyl acetate and saturated brine, dehydrated with anhydrous magnesium sulfate, concentrated under reduced pressure and drained, then added 100ml of acetic acid and heated to 70°C. At 70°C, 5ml of hydrochloric acid was added and reacted for 4 hours. Next, after extraction with ethyl acetate and saturated brine, dehydration with anhydrous magnesium sulfate, and concentration under reduced pressure to dry up, purificatio...
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