Organic electroluminescence compound and preparation method and application thereof
A technology of electroluminescent display and electroluminescent devices, applied in the direction of organic chemistry, chemical instruments and methods, luminescent materials, etc., can solve the problems of backward panel manufacturing enterprises, insufficient development of organic electroluminescent materials, etc., and achieve increased luminous frequency , The effect of reducing the driving voltage
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Embodiment 1
[0066] Embodiment 1: the synthesis of compound 26
[0067]
[0068] 1) Synthesis of Intermediate 1:
[0069] In a 500ml reaction flask, add 15g (69.4mmol) of 3-bromo-2-pyridinecarboxylic acid methyl ester, add 200ml of tetrahydrofuran and stir to dissolve, add 8.9g (69.4mmol) of 3-thiophene boronic acid, add 3-thiophene boronic acid dissolved in 80ml of water 23.8g (172.5mmol) of potassium carbonate was replaced with nitrogen for 15 minutes, and 0.79g (0.694mmol) of tetrakistriphenylphosphine palladium was added, under nitrogen protection, stirred and heated to 70 degrees, and reacted for 4 hours. Add 100ml of water after the reaction is complete, stir and separate the liquids, wash the organic phase with 150ml of saturated sodium chloride solution, dry the organic phase with anhydrous sodium sulfate, filter, distill under reduced pressure to remove the solvent, and separate and purify by column chromatography to obtain intermediate 1 as 8.4g, yield 55%.
[0070]
[00...
Embodiment 2
[0090] Embodiment 2: the synthesis of compound 58
[0091]
[0092] 1) Synthesis of Intermediate 7:
[0093] In a 500ml reaction flask, add 15g (69.4mmol) of 3-bromoisonicotinic acid methyl ester, add 200ml of tetrahydrofuran and stir to dissolve, add 8.9g (69.4mmol) of 3-thiophene boronic acid, add 23.8 g (172.5 mmol) of potassium carbonate, replaced with nitrogen for 15 minutes, added 0.79 g (0.694 mmol) of tetrakistriphenylphosphine palladium, protected by nitrogen, stirred and heated to 70 degrees, and reacted for 4 hours. Add 100ml of water after the reaction is complete, stir and separate the liquids, wash the organic phase with 150ml of saturated sodium chloride solution, dry the organic phase with anhydrous sodium sulfate, filter, distill under reduced pressure to remove the solvent, and separate and purify by column chromatography to obtain intermediate 7 as 8.6 g, yield 61%.
[0094]
[0095] 2) Synthesis of Intermediate 8:
[0096] In a 500ml reaction flask...
Embodiment 3
[0114] Embodiment 3: the synthesis of compound 77:
[0115] 1) Synthesis of intermediate 13:
[0116]
[0117] In a 500ml reaction flask, add 20.5g (69.4mmol) of methyl 3,6-dibromopicolinate, add 200ml of tetrahydrofuran and stir to dissolve, add 8.9g (69.4mmol) of 3-thiophene boronic acid, add and dissolve in 80ml 23.8g (172.5mmol) of potassium carbonate in water was replaced with nitrogen for 15 minutes, and 0.79g (0.694mmol) of tetrakistriphenylphosphine palladium was added, under nitrogen protection, stirred and heated to 70°C, and reacted for 4 hours. After the reaction is complete, add 100ml of water, stir and separate the liquids, wash the organic phase with 150ml of saturated sodium chloride solution, dry the organic phase with anhydrous sodium sulfate, filter, distill under reduced pressure to remove the solvent, and separate and purify by column chromatography to obtain intermediate 13 as 7.2 g, yield 35%.
[0118] 2) Synthesis of intermediate 14:
[0119]
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