Organic compound based on pyridine and benzimidazole and application of organic compound
An organic compound, benzimidazole technology, applied in the field of organic compounds and its application in OLED, can solve the problems affecting the angular distribution of OLED radiation spectrum and complex manufacturing process, etc.
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Embodiment 1
[0066] Embodiment 1: the synthesis of intermediate I
[0067] Taking the synthesis of intermediate A1 as an example
[0068]
[0069] In a 250mL three-necked flask, blow nitrogen gas, add 0.04mol raw material 2,3-dibromo-5,6-dichloropyrazine, 100ml THF, 0.1mol phenylboronic acid, 0.0008mol tetrakis(triphenylphosphine) palladium, Stir, then add 0.12mol of K 2 CO 3 Aqueous solution (2M), heated to 80°C, refluxed for 5 hours, sampled and plated, the reaction was complete. Cool naturally, extract with 200ml of dichloromethane, separate layers, dry the extract with anhydrous sodium sulfate, filter, rotate the filtrate, and purify through a silica gel column to obtain intermediate A1 with a HPLC purity of 99.7% and a yield of 87.2%.
[0070] Elemental analysis structure (molecular formula C 16 h 10 Cl 2 N 2 ): theoretical value C, 63.81; H, 3.35; Cl, 23.54; N, 9.30; test value: C, 63.79; H, 3.34; Cl, 23.55; N, 9.32. ESI-MS(m / z)(M + ): The theoretical value is 300.02,...
Embodiment 2
[0079] Embodiment 2: the synthesis of intermediate II
[0080] Take the synthesis of intermediate B1 as an example
[0081]
[0082] In a 250mL three-necked flask, nitrogen gas was introduced, and 0.02mol of intermediate A6, 100ml of THF, 0.03mol of (4-(9-H-carbazol-9-yl)phenyl)boronic acid, and 0.0004mol of tetrakis(triphenyl) Phosphine) palladium, stir, then add the K of 0.06mol 2 CO 3 Aqueous solution (2M), heated to 80°C, refluxed for 5 hours, sampled and plated, the reaction was complete. Cool naturally, extract with 200ml of dichloromethane, separate layers, dry the extract with anhydrous sodium sulfate, filter, rotate the filtrate, and purify through a silica gel column to obtain intermediate B1 with a HPLC purity of 99.4% and a yield of 75.3%.
[0083] Elemental analysis structure (molecular formula C 34 h 22 ClN 3 ): theoretical value C, 80.38; H, 4.36; Cl, 6.98; N, 8.27; test value: C, 80.41; H, 4.35; Cl, 6.99; N, 8.25. ESI-MS(m / z)(M + ): The theoretic...
Embodiment 3
[0088] Embodiment 3: intermediate Synthesis
[0089] When R 1 When expressed as a structure of general formula (5),
[0090]
[0091] (1) In a 250mL three-necked flask, feed nitrogen gas, add 0.02mol raw material 2-bromo-benzimidazole, 0.03molAr 5 -I, 0.04mol sodium hydride, 0.004mol cuprous iodide and 0.01mol o-phenanthroline were dissolved in 100ml 1,3-dimethyl-2-imidazolidinone, stirred for 20-30h, after the reaction, add water And extract with dichloromethane, dry the organic layer with anhydrous sodium sulfate, use the mixture of petroleum ether and ethyl acetate as eluent rinse, the volume ratio of petroleum ether and ethyl acetate in the eluent is 1:100, column layer analysis and purification to obtain intermediate M;
[0092]
[0093] (2) Under a nitrogen atmosphere, weigh the intermediate M and dissolve it in tetrahydrofuran, and then dissolve the Br-Ar 1 -B(OH) 2 And tetrakis (triphenylphosphine) palladium is added, the mixture is stirred, and then satur...
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