An organic electroluminescent compound
A technology of luminescence and compounds, applied in the field of organic electroluminescence compounds, can solve problems such as poor device efficiency and lifespan, unsatisfactory users, short blue light wavelength, etc., and achieve outstanding market potential, promote development, and high color purity Effect
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Embodiment 1
[0042] Example 1 Preparation of Compound 11
[0043]
[0044] Step 1: Synthesis of Intermediate 1
[0045]
[0046] Dissolve raw material 1 (21.2 g, 100 mmol) and methyl 2,5-dibromoterephthalate (35.2 g, 100 mmol) in 500 ml of toluene solution, then add 100 ml of 2M aqueous sodium carbonate and 100 ml of ethanol was degassed with nitrogen for one hour, and the catalyst tetrakis(triphenylphosphine)palladium (Pd(PPh 3 ) 4, 3.5 g, 3 mmol), under stirring conditions, heated to 100 ° C, reacted for 24 hours, cooled to room temperature, added dichloromethane and deionized water, extracted the organic phase, dried with anhydrous magnesium sulfate, filtered, reduced Compressed, concentrated, separated and purified by silica gel column, the eluent is petroleum ether / ethyl acetate=4:1 (v:v), to obtain about 34.2 g (78 mmol) of pure intermediate 1, and the yield is about 78%. .
[0047] Mass spectrum MS of intermediate 1 [ESI + ] m / z = 438.16 (theoretical value is 438.01).
...
Embodiment 2
[0076] Example 2 Preparation of Compound 13
[0077]
[0078] 13
[0079] Steps 1 to 6: Synthesis of Intermediates 1-6
[0080] The synthesis method and specific steps of intermediate 1-6 are the same as those in Example 1.
[0081] Step 7: Synthesis of Intermediate 8
[0082]
[0083] 4-Methyl-1-aniline (5.4 g, 50 mmol), 4-bromodibenzofuran (12.4 g, 50 mmol), bis(dibenzylideneacetone)palladium (0.8 g, 1.5 mmol), tris A mixture of tert-butylphosphine (0.6 g, 3 mmol) and toluene (100 ml) was heated to 90°C under argon flow, followed by sodium tert-butoxide (0.3 g, 3 mmol) and heated under argon atmosphere to 110°C and stirred for 12 hours. The reaction mixture was cooled to room temperature, and water was added for liquid separation; the solvent of the obtained organic layer was concentrated, and the obtained solid was purified by silica gel column chromatography to obtain intermediate 8 (20.2 g, 39 mmol), 78% yield Rate.
[0084] Mass spectrum MS of intermediate 8 ...
Embodiment 3
[0089] Example 3 Photoluminescence Spectrum Detection
[0090] Dissolve compound 11 and compound 13 in toluene solvent, the concentration is about 10 -4 mol / L, on the E1PLMM010 photoluminescence spectrometer, with 300 nm as the excitation light, the main peaks of the photoluminescence (PL) spectra of the two are shown in Table 1.
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