Phosphorescent compound, preparation method thereof and organic electroluminescent device
An electroluminescent device and compound technology, applied in the fields of phosphorescent compounds and organic electroluminescent devices, can solve the problems of low life, long time, complex synthesis process, etc., and achieves easy availability of raw materials, simple synthesis process and product yield high effect
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Embodiment 1
[0035] This embodiment provides a phosphorescent compound whose chemical structural formula is formula 2 in the summary of the invention. The reaction scheme of the preparation method of the phosphorescent compound is as follows:
[0036]
[0037] Its specific preparation method comprises the following steps:
[0038] Step 1, the preparation process of intermediate C-2:
[0039] Under a nitrogen protection system, reactant A-2 (110 mmol) was added into a three-necked flask, and sodium tert-butoxide (t-BuONa, 330 mmol) was added, and stirred at room temperature for 30 minutes. Then add reactant B-2 (121mmol), tri-tert-butylphosphine (P(t-bu) 3 , 11.0mmol) and tris(dibenzylideneacetone)dipalladium (Pd 2 (dba) 3 , 3.30mmol), plus 300mL of toluene. The reaction was carried out at 110° C. for 24 hours. After confirming that the reaction is complete, cool down to 50°C and filter with suction, rinse the filter cake with about 50mL of ethyl acetate, spin the filtrate to obtain...
Embodiment 2
[0044] This embodiment provides a phosphorescent compound whose chemical structural formula is formula 5 in the summary of the invention. The reaction scheme of the preparation method of the phosphorescent compound is as follows:
[0045]
[0046] Its specific preparation method comprises the following steps:
[0047] Intermediate D-5 was first prepared according to the synthesis method of intermediate D-2 in Example 1 above;
[0048] Next, under the protection of nitrogen, the Pd 2 (dba) 3 (1.5mmol) and t-BuONa (150.0mmol), were added into anhydrous toluene, and stirred at room temperature for 30 minutes. Then add intermediate D-5 (75mmol) and reactant E-5 (82.5mmol), finally add P(t-bu) 3 (15 mmol), the temperature was raised to 100° C. for 24 hours. Cool down, filter with suction to obtain a dark filtrate, spin the filtrate to obtain a solid, add dichloromethane to dissolve, pass through a silica gel funnel to obtain a colorless solution, and spin dry to obtain the a...
Embodiment 3
[0050] This embodiment provides a phosphorescent compound whose chemical structural formula is formula 12 in the summary of the invention. The reaction scheme of the preparation method of the phosphorescent compound is as follows:
[0051]
[0052] Its specific preparation method comprises the following steps:
[0053] First prepare intermediate D-12 according to the synthetic method of embodiment 1 intermediate D-2;
[0054] Next, under the protection of nitrogen, the Pd 2 (dba) 3 (1.5mmol) and t-BuONa (150.0mmol), were added into anhydrous toluene, and stirred at room temperature for 30 minutes. Then add intermediate D-12 (75mmol) and reactant E-12 (82.5mmol), finally add P (t-bu) 3 (15 mmol), the temperature was raised to 100° C. for 24 hours. Cool down and filter with suction to obtain a dark filtrate, spin the filtrate to obtain a solid, add dichloromethane to dissolve, pass through a silica gel funnel to obtain a colorless solution, and spin dry to obtain the abov...
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