Compound and application thereof
A compound and an independent technology, applied in the field of organic electroluminescence, can solve the problems of OLED product efficiency, lifespan, cost, etc., and achieve the effects of enhancing TADF properties, reducing orbital overlap, and low driving voltage
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Synthetic example 1
[0130] Synthesis Example 1: Synthesis of BH22
[0131]
[0132] Synthesis of intermediate BH22-1:
[0133] At room temperature, A (2.18g, 10mmol), B (4.2g, 25mmol), potassium carbonate (4.15g, 30mmol) and N,N-dimethylformamide (DMF, 300mL) were added to a 0.5L single-necked bottle, Nitrogen was replaced and protected, the temperature was raised to 60 degrees Celsius, and the reaction was carried out for 4 hours.
[0134] Stop the reaction, filter while hot, and wash the solid with a large amount of water and ethanol respectively. 3.7 g of a yellow solid was obtained with a yield of 72.6%. Molecular ion mass determined by mass spectrometry: 514.15 (theoretical value: 513.06).
[0135] Synthesis of intermediate BH22-2:
[0136] At room temperature, add D (2.4g, 10.0mmol), E (4.15g, 25.0mmol) and potassium carbonate (4.15g, 30mmol) to a 0.5L three-necked flask, DMF (300mL), nitrogen replacement and protection, and heat up to 60 Celsius, reaction 4h.
[0137] Stop the rea...
Synthetic example 2
[0141] Synthesis Example 2: Synthesis of BH23
[0142]
[0143] Synthesis of intermediate BH23-1:
[0144] At room temperature, add D (2.4g, 10.0mmol), F (5.56g, 25.0mmol) and potassium carbonate (4.15g, 30mmol) to a 0.5L three-necked flask, DMF (300mL), nitrogen replacement and protection, and heat up to 60 Celsius, reaction 4h.
[0145] Stop the reaction, filter while hot, and wash the solid with a large amount of water and ethanol respectively. 3.74 g of a yellow solid was obtained with a yield of 57.9%. Molecular ion mass determined by mass spectrometry: 647.61 (theoretical value: 646.37).
[0146] Synthesis of compound BH23:
[0147] Add BH22-1 (2g, 3.89mmol), BH23-1 (2.77g, 4.28mmol), tetrakistriphenylphosphine palladium (45mg, 39μmol) and sodium carbonate (1.24g, 11.66mmol) to a 500mL three-necked flask and dissolve in 300mL of 1,4-dioxane and 100mL of water were replaced with nitrogen three times and protected, the temperature was raised to 110°C, and the react...
Synthetic example 3
[0149] Synthesis Example 3: Synthesis of BH49
[0150]
[0151] Synthesis of intermediate BH49-1:
[0152] At room temperature, A (2.18g, 10mmol), G (6.99g, 25mmol), potassium carbonate (4.15g, 30mmol) and DMF (300mL) were added to a 0.5L single-necked bottle, replaced with nitrogen and protected, and the temperature was raised to 60 degrees Celsius, Reaction 4h.
[0153] Stop the reaction, filter while hot, and wash the solid with a large amount of water and ethanol respectively. 5.38 g of a yellow solid was obtained, and the yield was 73.0%.
[0154] Synthesis of compound BH49:
[0155] Add BH49-1 (4g, 3.89mmol), BH22-2 (3.19g, 4.28mmol), tetrakistriphenylphosphine palladium (62mg, 39μmol) and sodium carbonate (1.73g, 16.29mmol) to a 500mL three-necked flask and dissolve in 300mL of 1,4-dioxane and 100mL of water were replaced with nitrogen three times and protected, the temperature was raised to 110°C, and the reaction was carried out overnight.
[0156] Silica gel ...
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