Organic electroluminescent compound and application thereof
A compound and luminescent technology, which is applied in organic chemistry, luminescent materials, circuits, etc., can solve the problems of poor thermal stability, short life of organic light-emitting devices, and reduce the use degree, etc., to achieve increased glass transition temperature, high heat and chemical stability sex, avoid compound effects
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[0027]
[0028] Synthesis of Intermediate A1
[0029] In a 500mL one-necked flask, add 0.1mol of 5-bromoindole, 0.2mol of pinacol diborate, 0.2mol of potassium acetate, 1.50g of [1,1'-bis(diphenylphosphino) ) ferrocene] palladium dichloride, 350mL of dioxane, refluxed for 8h under nitrogen protection; after cooling, spin evaporated to remove dioxane, washed with 200mL of distilled water and extracted 3 times with dichloromethane; - Recrystallization from dichloromethane gave 21.8 g of intermediate A1 with a yield of 90%.
[0030] Synthesis of Intermediate A2
[0031] In a 50mL one-necked flask, add 10mmol of intermediate A1, 11mmol of 9-phenyl-9-(4-bromophenyl)fluorene, 20mmol of potassium carbonate, 50mg of tetrakistriphenylphosphopalladium, 20mL of Oxyhexane and 4.0mL of water were refluxed for 5h under the protection of nitrogen; after cooling, the dioxane was removed by rotary evaporation, washed with 20mL of distilled water and extracted three times with dichlorometh...
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