Compound and organic electroluminescent device containing same
A compound and electroluminescence technology, applied in the field of compounds and organic electroluminescence devices, can solve the problems of carrier mismatch and affect the luminescence performance of the device, and achieve the effect of reducing energy level difference, avoiding interface luminescence phenomenon and good stability
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[0086] The preparation method of the compound of the present invention can be prepared by a conventional coupling reaction in the art, for example, it can be prepared by the following synthetic route, but the present invention is not limited thereto:
[0087]
[0088] Compound (A) and containing Ar 1 A Buchwald reaction occurs to the aromatic amine compound to obtain the intermediate (A-1); the intermediate (A-1) undergoes a Buchwald reaction with a bromide containing a group M, and finally the target compound formula (I) is obtained;
[0089] Contains Ar 2 、Ar 3 bromide with Ar 4 、Ar 5 The aromatic amine compound undergoes a Buchwald reaction to obtain an intermediate (A-2); the intermediate (A-2) undergoes a Buchwald reaction with a bromide containing a group M to finally obtain the target compound formula (II).
[0090] Wherein, the bromide containing group M can be prepared through the following synthetic route, but the present invention is not limited thereto:
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Embodiment 1
[0111] Embodiment 1: the preparation of compound 1
[0112]
[0113] Aniline (9.41 g, 101 mmol) and paraformaldehyde (6.18 g, 206 mmol) were added in batches to trifluoroacetic acid (200 mL) with stirring, and stirred at -15°C for 20 min. Cooled to room temperature, stirred for 48 h, and then the above mixture was slowly added to the stirred mixture (composed of ice and ammonia solution) at 0°C. The resulting mixture was extracted with dichloromethane, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by column chromatography (dichloromethane / ethyl acetate, 95:5) to obtain (8.53 g, 38.4 mmol) intermediate (B-1) with a yield of 76%.
[0114] Intermediate B-1 (7.78g, 35mmol) and NBS (7.48g, 42mmol) were dissolved in DMF solution, stirred at 0°C for 15min, warmed to room temperature, and stirred for 92h. After the resulting mixture was extracted with dichloromethane, the organic phase was washed with water, dried over magnesium sulfate, concen...
Embodiment 2
[0118] Embodiment 2: the preparation of compound 2
[0119] The aniline was replaced by an equimolar amount of o-toluidine, and the other steps were the same as in Example 1 to obtain compound 2.
[0120] Mass Spectrum m / z: 609.42 (calculated: 609.31). Theoretical element content (%)C 44 h 39 N 3 : C, 86.66; H, 6.45; N, 6.89. Measured element content (%): C, 86.79; H, 6.46; N, 6.93. The above results confirmed that the obtained product was the target product.
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