Novel organic electroluminescent compounds and organic electroluminescent device using the same
A compound and luminescent technology, which is applied in the direction of electroluminescent light sources, silicon organic compounds, indium organic compounds, etc., can solve the problems of short working life, low glass transition temperature, and poor thermal stability of organic EL devices, and achieve improved current properties, good life properties, and the effects of good layering properties
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Embodiment 1
[0091] Embodiment 1: the preparation of compound C-28
[0092]
[0093] Preparation of compound 1-1
[0094] 1,4-Dibromo-2-nitrobenzene (30g, 131mmol), dibenzo[b,d]thiophen-4-ylboronic acid (44g, 156.6mmol), Pd(PPh 3 ) 4 (7.6g, 6.58mmol) and Na 2 CO 3 (41.8 g, 394 mmol) was added to a mixture of toluene (500 mL), ethanol (100 mL) and purified water (100 mL), and the mixture was stirred at 120° C. for 3 hours. After the reaction was complete, the mixture was allowed to stand and the aqueous layer was removed. The obtained organic layer was concentrated, followed by purification through a silica column to obtain Compound 1-1 (40 g, 80%).
[0095] Preparation of compound 1-2
[0096] After the mixture 1-1 (40 g, 104 mmol) was dissolved in 1,2-dichlorobenzene (150 mL), triethoxyphosphine (150 mL) was added. The reaction mixture was stirred at 150°C for 20 hours. The reaction mixture was cooled to room temperature, followed by distillation under reduced pressure to ...
Embodiment 2
[0110] Embodiment 2: the preparation of compound C-47
[0111]
[0112] Preparation of compound 2-1
[0113] 2-Bromo-9,9-dimethyl-9H-fluorene (50.0 g, 183 mmol), 2-chloroaniline (28.4 mL, 274.5 mmol), Pd(OAc) 2 (1.64g, 7.32mmol), P(t-Bu) 3After (50%) (7.2 mL, 14.64 mmol) and NaOt-Bu (43.97 g, 457.5 mmol) were added to toluene (450 mL), the reaction mixture was stirred at reflux for 1 day. After the reaction was completed, the mixture was cooled to room temperature, followed by extraction with distilled water and ethyl acetate. The organic layer was distilled under reduced pressure, and then filtered through a column with dichloromethane (MC) and hexane to obtain compound 2-1 (46.7 g, 80%).
[0114] Preparation of compound 2-2
[0115] Compound 2-1 (46.7g, 14.6 mmol), Pd(OAc) 2 (1.64g, 7.3 mmol), di-tert-butyl (methyl) phosphine HBF 4 (di-t-butyl(methyl)phosphine·HBF 4 ) (3.62g, 14.6mmol), K 2 CO 3 (60.5 g, 438 mmol) and dimethylamide (DMA) (50 mL) were mixed,...
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