Pyrazine united pyrimidine derivative and its organic lighting device
An organic light-emitting device, pyrazine bipyrimidine technology, applied in the field of pyrazine bipyrimidine derivatives and organic light-emitting devices, can solve the problems of unbalanced recombination of electrons and holes in the light-emitting layer, fast device loss, and low luminous efficiency. Achieve good bipolar transmission performance, good luminous efficiency and lifetime performance, and simple preparation method
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Embodiment 1
[0057] [Example 1] Synthesis of Compound 1
[0058]
[0059] Step1: Add 5-(5-bromopyrazin-2-yl)pyrimidin-2-amine (2.18g, 8.4mmol), bromobenzene (2.86g, 18.2mmol), potassium tert-butoxide (2.83g, 25.2mmol), Pd 2 (dba) 3 (0.07g, 0.08mmol), 40mL of ultrasonically deoxygenated xylene, stirred and dissolved, replaced the air three times, added P(t-Bu) 3 (0.07g, 0.34mmol), replace the air three times again, reflux for 6h, cool to room temperature, add enough dichloromethane to make the product dissolve completely, pass through a small amount of silica gel funnel, remove catalyst and salt, and concentrate the filtrate to viscous , through column chromatography to obtain intermediate 1-1 (2.24g, 66%).
[0060] Step2: Add intermediate 1-1 (3.40g, 8.4mmol), diphenylamine (1.56g, 9.2mmol), potassium tert-butoxide (2.83g, 25.2mmol), Pd into the reaction vessel 2 (dba) 3 (0.07g, 0.08mmol), 40mL of ultrasonically deoxygenated xylene, stirred and dissolved, replaced the air three tim...
Embodiment 2
[0061] [Example 2] Synthesis of compound 2
[0062] According to the synthetic method of compound 1, compound 2 (4.28 g, 64%) was obtained.
[0063]
Embodiment 3
[0064] [Example 3] Synthesis of compound 19
[0065]
[0066] Step1: add aniline (0.75g, 8mmol), 2-bromo-triphenylene (2.05g, 6.67mmol), Pd in the reactor 2 (dba) 3 (0.17g, 0.2mmol), P(t-Bu) 3 (0.14g, 0.67mmol), NaOt-Bu (2.24g, 20mmol), 100mL of toluene solution, reacted at 100°C for 24h, extracted the organic phase with diethyl ether and water after the reaction, and washed the organic layer with MgSO 4 Drying, concentration of the organic matter, column chromatography and recrystallization gave intermediate 19-1 (1.58 g, 74%).
[0067] Step2: Add 5-(5-bromopyrazin-2-yl)pyrimidin-2-amine (2.18g, 8.4mmol), bromobenzene (1.32g, 8.4mmol), potassium tert-butoxide (2.83g, 25.2mmol), Pd 2 (dba) 3 (0.07g, 0.08mmol), 40mL of ultrasonically deoxygenated xylene, stirred and dissolved, replaced the air three times, added P(t-Bu) 3 (0.07g, 0.34mmol), replace the air three times again, reflux for 6h, cool to room temperature, add enough dichloromethane to make the product disso...
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