Purine derivative and organic electroluminescence device thereof
A technology of electroluminescent devices and derivatives, which is applied in the fields of electro-solid devices, electrical components, light-emitting materials, etc., can solve the problem of low electron and hole recombination efficiency, low luminous efficiency of light-emitting devices, and inability to effectively balance carriers, etc. problem, to achieve the effect of enhanced charge migration orientation, less crystallization, and easier charge dispersion.
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Embodiment 1
[0062] [Example 1] Synthesis of Compound 2
[0063]
[0064] Step1: Under the protection of nitrogen, add 8-bromo-2,6-dichloro-7H-purine (2.25g, 8.4mmol), 2-naphthylboronic acid (1.58g, 9.2mmol) and tetrakistriphenylphosphine palladium into the reaction vessel (0.09g, 0.08mmol), potassium carbonate (3.48g, 25.2mmol), toluene 60mL, ethanol 20mL and distilled water 20mL, stirred at 120°C for 3h. After the reaction was finished, stop the reaction with distilled water, extract with ethyl acetate, and use MgSO 4 After drying, the solvent was distilled off under reduced pressure, and then purified by silica gel column chromatography to obtain Intermediate 2-1 (1.72 g, 65%).
[0065] Step2: Under nitrogen protection, add 2-1 (2.65g, 8.4mmol), 2-naphthylboronic acid (3.18g, 18.5mmol), tetrakistriphenylphosphine palladium (0.09g, 0.08mmol), potassium carbonate ( 3.48g, 25.2mmol), toluene 60mL, ethanol 20mL and distilled water 20mL, stirred at 120°C for 3h. After the reaction was fi...
Embodiment 2
[0067] [Example 2] Synthesis of compound 4
[0068] According to the synthetic method of compound 2, compound 4 (3.11 g, 59%) was obtained.
[0069]
Embodiment 3
[0070] [Example 3] Synthesis of Compound 5
[0071] According to the synthetic method of compound 2, compound 5 (2.69 g, 64%) was obtained.
[0072]
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