阅读说明：本技术 一种化合物及其应用 (Compound and application thereof ) 是由 鄢亮亮 陈少福 戴雷 蔡丽菲 于 2020-05-25 设计创作，主要内容包括：本发明提供一种化合物及其应用。本发明所述的化合物,具有式(1)所述的结构。本发明将菲和荧蒽基团通过氮连接而成得到的化合物具有光、电、热稳定性好,发光效率高,电压低、寿命长等优点,可用于有机电致发光器件中,特别是作为电子阻隔层材料、空穴传输层材料,具有应用于AMOLED产业的可能。(The invention provides a compound and application thereof. The compound of the invention has the structure shown in the formula (1). The invention is formed by connecting phenanthrene and fluoranthene groups through nitrogenThe obtained compound has the advantages of good light, electricity and thermal stability, high luminous efficiency, low voltage, long service life and the like, can be used in organic electroluminescent devices, particularly as an electron blocking layer material and a hole transport layer material, and has the possibility of being applied to the AMOLED industry.)

1. A compound having a structural formula as shown in formula (1):

wherein any one of R1 to R10 is a single bond for bonding to L1, and the others are each independently a substituent;

any one of R11 to R20 is a single bond for bonding to L2, and the others are each independently a substituent;

each of the substituents is independently selected from hydrogen, deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano, nitro; or two adjacent substituents are linked to each other to form a ring;

L₁-L₃each independently represents a single bond, an arylene group having C6-50 ring carbon atoms and substituted or unsubstituted by R, or a heteroarylene group having C5-50 ring carbon atoms and substituted or unsubstituted by R;

ar represents an aryl group having 6 to 50 ring carbon atoms which is substituted or unsubstituted with R, a heteroaryl group having 5 to 50 ring carbon atoms which is substituted or unsubstituted with R, a monocyclic or polycyclic C3 to C60 alicyclic or aromatic ring which is substituted or unsubstituted with R, or a monocyclic or polycyclic C3 to C60 alicyclic or aromatic ring which is substituted or unsubstituted with R, wherein one or more carbon atoms are replaced by at least one heteroatom selected from O, S, N, Se, Si, Ge;

the hetero atom in the heteroaryl or heteroalkyl group is selected from at least one hetero atom of O, S, N, Se, Si, Ge;

r is at least 1 group selected from deuterium, F, Cl, Br, C1-C4 alkyl, C1-C4 alkoxy, C3-C20 cycloalkyl, C6-C10 aryl, C7-30 aralkyl of aryl with ring carbon number of 6-10, C1-20 alkoxy, C6-10 aryloxy, and mono-, di-or tri-substituted silyl, cyano and nitro with substituent selected from alkyl with carbon number of 1-10 and aryl with ring carbon number of 6-10.

2. The compound of claim 1, having a structural formula of one of the following structures:

3. a compound according to claim 2, said R₁-R₂₀The substituents are respectively and independently selected from hydrogen, deuterium, halogen, C1-C4 alkyl, C3-C6 cycloalkyl, C6-C14 aralkyl, C1-C14 alkoxy, C6-C14 aryloxy, amino, C6-C14 aryl, cyano and nitro;

L₁-L₃each independently represents a single bond, an arylene group having 6 to 14 ring carbon atoms which is substituted or unsubstituted with R, or a heteroarylene group having 5 to 13 ring carbon atoms which is substituted or unsubstituted with R;

the heteroatom in the heteroaryl group is selected from at least one heteroatom in O, S, N, Si;

and R is independently selected from deuterium, F, Cl, Br, C1-C4 alkyl.

4. A compound according to claim 3, said R₁-R₄、R₉-R₂₀Each independently selected from hydrogen, R₅-R₈Three of which are hydrogen and the other is hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted phenyl, phenyl or naphthyl;

L₁-L₃each independently represents a single bond, a C1-C4 alkyl substituted or unsubstituted phenylene group, a C1-C4 alkyl substituted or unsubstituted naphthylene group.

5. The compound according to claim 2, wherein the cyclic structure formed by connecting two adjacent substituents R1-R20 is a ring represented by the following general formula (2) or (3)

Wherein, Y₁、Y₂And Y₃、Y₄X is independently selected from O/S/SO for the position of attachment to the ring₂/NR₁₀₉/CR₁₁₀R₁₁₁/SiR₁₁₂R₁₁₃，R₁₀₁-R₁₀₉Each independently is selected from hydrogen, deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano, nitro.

6. The compound of any one of claims 1-5, wherein Ar is represented by any one of the following formulae (a) to (x):

wherein R is₂₀₀-R₂₅₇Independently of one another, represent no substitution up to the maximum possible number of substitutions when R₂₀₀-R₂₅₇When the substituent groups are respectively and independently selected from deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano and nitro; or two adjacent groups are linked to each other to form a ring;

denotes the bonding position to L3 in formula (1).

7. The compound of claim 6, wherein R₂₀₀-R₂₅₇Each independently is selected from hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted or unsubstituted phenyl, C1-C4 alkyl substituted or unsubstituted naphthyl.

8. The compound of claim 2, having a structural formula of one of the following structures;

9. an electroluminescent device comprising a compound as claimed in any one of claims 1 to 8.

10. An electroluminescent device according to claim 9, wherein the compound according to any one of claims 1 to 8 is used as a hole transport layer material or an electron blocking layer material.

Technical Field

The invention relates to the technical field of organic electroluminescence, in particular to an organic luminescent material suitable for an organic electroluminescent device, and particularly relates to a compound formed by connecting phenanthrene and fluoranthene groups through nitrogen and application of the compound to the organic electroluminescent device.

Background

At present, organic electroluminescent devices (OLEDs), which are a new generation of display technologies, are gaining more and more attention in display and lighting technologies, and have a very broad application prospect. However, the performance of OLED devices, such as light emission efficiency, driving voltage, and lifetime, is still in need of further enhancement and improvement compared to market application requirements.

Generally, the OLED device has a basic structure in which various organic functional material thin films with different functions are sandwiched between metal electrodes, as a sandwich structure, and holes and electrons are respectively injected from a cathode and an anode under the driving of current, and after the holes and the electrons move for a certain distance, they are recombined in a light emitting layer and released in the form of light or heat, thereby generating light emission of the OLED. However, the organic functional material is a core component of the organic electroluminescent device, and the thermal stability, photochemical stability, electrochemical stability, quantum yield, film forming stability, crystallinity, color saturation and the like of the material are main factors influencing the performance of the device.

Patent document 1(US20150155491) describes compounds in which a 3-phenanthryl group is bonded to a nitrogen atom directly or via a linker, and these compounds are useful as a hole injection layer material, a hole transport layer material, an electron blocking layer material, and the like for an organic electroluminescent device. Patent document 2(JP2014511352) describes compounds in which a 2-phenanthryl group is bonded to a nitrogen atom directly or via a linker, and these compounds are used as a hole transport layer material or an electron blocking layer material for an organic electroluminescent device. Patent document 3(CN107848950) describes compounds in which two phenanthryl groups are bonded to a nitrogen atom directly or via a linker, and these compounds are used as electron blocking layer materials in organic electroluminescent devices, and further improvements in the performance such as optical, electrical, thermal stability, and light emission efficiency are desired.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a high-performance organic electroluminescent device and a novel material capable of realizing such an organic electroluminescent device.

The present inventors have made intensive studies to achieve the above object, and as a result, have found that a high-performance organic electroluminescent device can be obtained by using a compound represented by the following formula (1).

One of the purposes of the invention is to provide a compound in which phenanthrene and fluoranthene are connected through nitrogen, and the compound has the advantages of good film forming property, good optical, electrical and thermal stability, high luminous efficiency, low voltage, long service life and the like, and can be used in an organic light-emitting device. Particularly, the organic electroluminescent material can be used as an electric hole transport material and an electron blocking layer material and can be applied to the AMOLED industry.

In order to achieve the purpose, the invention adopts the following technical scheme:

a compound having a structural formula as shown in formula (1):

wherein any one of R1 to R10 is a single bond for bonding to L1, and the others are each independently a substituent;

any one of R11 to R20 is a single bond for bonding to L2, and the others are each independently a substituent;

each of the substituents is independently selected from hydrogen, deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano, nitro; or two adjacent substituents are linked to each other to form a ring;

L₁-L₃each independently represents a single bond, an arylene group having C6-50 ring carbon atoms and substituted or unsubstituted by R, or a heteroarylene group having C5-50 ring carbon atoms and substituted or unsubstituted by R;

ar represents an aryl group having 6 to 50 ring carbon atoms which is substituted or unsubstituted by R, a heteroaryl group having 5 to 50 ring carbon atoms which is substituted or unsubstituted by R, a monocyclic or polycyclic C3 to C60 alicyclic or aromatic ring which is substituted or unsubstituted by R, or a monocyclic or polycyclic C3 to C60 alicyclic or aromatic ring which is substituted or unsubstituted by R, wherein one or more carbon atoms are replaced by at least one heteroatom selected from O, S, N, Se, Si, Ge; the hetero atom in the heteroaryl or heteroalkyl group is selected from at least one hetero atom of O, S, N, Se, Si, Ge;

r is at least 1 group selected from deuterium, F, Cl, Br, C1-C4 alkyl, C1-C4 alkoxy, C3-C20 cycloalkyl, C6-C10 aryl, C7-30 aralkyl of aryl with ring carbon number of 6-10, C1-20 alkoxy, C6-10 aryloxy, and mono-, di-or tri-substituted silyl, cyano and nitro with substituent selected from alkyl with carbon number of 1-10 and aryl with ring carbon number of 6-10;

preferred compounds are represented by the following formulae (1-1a) to (1-1 d):

preferably: the R is₁-R₂₀The substituents are respectively and independently selected from hydrogen, deuterium, halogen, C1-C4 alkyl, C3-C6 cycloalkyl, C6-C14 aralkyl, C1-C14 alkoxy, C6-C14 aryloxy, amino, C6-C14 aryl, cyano and nitro;

L₁-L₃each independently represents a single bond, quiltR is substituted or unsubstituted arylene with 6-14 ring carbon atoms, or heteroarylene with 5-13 ring carbon atoms, which is substituted or unsubstituted by R;

the heteroatom in the heteroaryl group is selected from at least one heteroatom in O, S, N;

and R is independently selected from deuterium, F, Cl, Br, C1-C4 alkyl.

Further preferably: the R is₁-R₄、R₉-R₂₀Each independently selected from hydrogen, R₅-R₈Three of which are hydrogen and the other is hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted phenyl, or naphthyl;

L₁-L₃each independently represents a single bond, a C1-C4 alkyl substituted or unsubstituted phenylene group, a C1-C4 alkyl substituted or unsubstituted naphthylene group.

The preferable compound is characterized in that the ring structure formed by connecting two adjacent substituents R1-R20 can be a ring represented by the following general formula (2) and formula (3):

wherein, Y₁、Y₂And Y₃、Y₄X is independently selected from O/S/SO for the position of attachment to the ring₂/NR₁₀₉/CR₁₁₀R₁₁₁/Si R₁₁₂R₁₁₃，R₁₀₁-R₁₀₉Each independently is selected from hydrogen, deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano, nitro.

The preferable compound is one wherein Ar is represented by any one of the following formulae (a) to (x);

wherein R is₂₀₀-R₂₅₇Independently of one another, represent no substitution up to the maximum possible number of substitutions when R₂₀₀-R₂₅₇When the substituent groups are respectively and independently selected from deuterium, halogen, C1-C10 alkyl substituted or unsubstituted by R, C3-C20 cycloalkyl substituted or unsubstituted by R, C1-C10 heteroalkyl substituted or unsubstituted by R, C6-C30 aralkyl substituted or unsubstituted by R, C1-C10 alkoxy substituted or unsubstituted by R, C6-C30 aryloxy substituted or unsubstituted by R, amino, C3-C30 silyl substituted or unsubstituted by R, C6-C30 aryl substituted or unsubstituted by R, C3-C30 heteroaryl substituted or unsubstituted by R, cyano and nitro; or two adjacent groups are linked to each other to form a ring;

denotes the bonding position to L3 in formula (1).

Preferably: wherein R is₂₀₀-R₂₅₇Each independently is selected from hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted or unsubstituted phenyl, C1-C4 alkyl substituted or unsubstituted naphthyl.

As a preferred compound, the compound has a specific structural formula;

it is also an object of the present invention to provide an organic electroluminescent device comprising the above compound;

the material of the invention is used as a hole transport material in an organic electroluminescent device; or

The material of the invention is used as an electron barrier material in an organic electroluminescent device.

The material of the present invention has the advantages of good film forming property, good optical, electrical and thermal stability, high luminous efficiency, low voltage, long service life, etc., and can be used in organic light-emitting devices. Particularly, the organic electroluminescent material can be used as a hole transport material and an electron blocking layer material and can be applied to the AMOLED industry.

Detailed Description

The examples are only for the convenience of understanding the technical invention and should not be construed as specifically limiting the invention.

The raw materials and solvents involved in the synthesis of the compounds of the present invention are commercially available from suppliers well known to those skilled in the art, such as Alfa, Acros, and the like.

Example 1: synthesis of Compound A1

Synthesis of compound 03: to a 1L three-necked flask, Compound 01(45g, 0.13mol, 1.0eq), Compound 02(16.3g, 0.13mol, 1.0eq), Pd (PPh)₃)₄(3.1g，2.68mol，0.02eq)、K₂CO₃(37.02g，0.26mol，2.0eq)，THF/H₂O mixed solvent (8/2, total 450ml), vacuum, N with stirring₂The displacement was 3 times, heated and stirred at about 70 ℃ for 5h, and the completion of the reaction of starting material 01 was monitored by TLC (developer: Hex). Cooling, adding toluene (300ml), stirring for 0.5h, extracting, separating, collecting organic phase, concentrating to remove solvent, separating by column chromatography (eluent is Hex), and drying to obtain 22.09g white solid compound 03 with yield 49.5%. Mass spectrum: 334.22(M + H).

Synthesis of compound 05: to a 1L three-necked flask, compound 03(22g, 66.02mmol, 1.0eq), compound 04(10.53g, 67.34mmol, 1.02eq), Pd (dppf) Cl were added in this order₂(0.966g，1.32mmol，0.02eq)、K₂CO₃(18.25g，132.04mmol，2.0eq)，1,4-Dioxane/H₂O mixed solvent (10/2, total 264ml), vacuum, N with stirring₂The replacement is carried out for 3 times, and the reaction is carried out for 8 hours by heating to 80 ℃. TLC monitored the starting material 03 reaction complete (DCM/Hex ═ 1:20 as developing solvent). Cooling the reaction liquid to room temperature, adding toluene (200ml), stirring for 0.5h, extracting, separating, collecting an organic phase, filtering the organic phase by using kieselguhr, leaching a filter cake by using a small amount of toluene, collecting filtrate, concentrating the organic phase until only about 150ml of the organic phase is left, cooling to room temperature, slowly adding methanol (250ml), and stirring for crystallization for 3 h. Filtering, leaching the filter cake with a small amount of methanol, collecting the solid, drying for 8h under vacuum at 60 ℃ to obtain 19.78g of off-white solid compound 05 with the yield of 82.1%. Mass spectrum: 365.87(M + H).

Synthesis of compound 08: to a 1L three-necked flask, compound 06(26.8g, 82.66mmol, 1.0eq), compound 07(20.34g, 82.66mmol, 1.0eq), Pd132(585.3mg, 0.826mmol, 0.01eq), and K were added in this order₂CO₃(22.85g, 165.32mmol, 2.0eq), toluene/ethanol/water (10/2/2, ca. 375ml), vacuum with stirring, N₂The mixture was replaced 3 times, and heated under reflux for 16 hours. TLC monitored the starting material 06 reaction complete (DCM/Hex ═ 1:5 as developing solvent). After cooling to room temperature, the mixture was filtered, and the filter cake was rinsed with ethanol (100ml) and drained. The filter cake was added to a 1L one-necked flask, and DCM (600ml) was added, dissolved with stirring, filtered through celite, and spin-dried. The resulting solid was slurried 2 times with DCM (150ml) and dried under vacuum at 70 ℃ to give 27.3g of off-white solid compound 08 with a yield of 74.2%. Mass spectrum: 446.55(M + H).

Synthesis of compound a 1: into a 1L three-necked flask, compound 08(15g, 33.67mmol, 1.0eq), compound 05(12.28g, 33.67mmol, 1.0eq), Pd were added in this order₂(dba)₃(924.8mg，1.01mmol，0.03eq)，P(t-Bu)₃50% toluene solution (1.63g, 2.02mmol, 0.06eq), t-BuONa (4.85g, 50.5mmol, 1.5eq), dry xylene (200ml), vacuum with stirring, N₂The mixture was replaced 3 times, and heated under reflux for 16 hours. TLC monitored starting material 05 reaction complete (DCM/Hex ═ 1:8 as developing solvent). After cooling to room temperature, methanol (150ml) was added to the reaction solution, stirred for 2 hours, and the solid was collected by suction filtration. Adding the solid into a 1L single-neck bottle, adding DCM (450ml) and stirring for dissolving, addingAdding deionized water, washing with water for 3 times (150ml each time), collecting organic phase, filtering with silica gel, and spin drying the filtrate. Dissolving the obtained solid with THF (180ml) under heating, cooling, slowly adding methanol (180ml) dropwise, stirring for crystallizing for 2h, and vacuum filtering to obtain solid. The resulting crystals were recrystallized 2 times and dried under vacuum at 70 ℃ to give 16.81g of a white solid compound A1 with a yield of 64.5%. Sublimation purification of 16.81g of crude A1 yielded sublimate A1(11.5g, 68.7%). Mass spectrum: 774.96(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,2H),8.78(d,1H),8.43(d,J＝4.0Hz,3H),7.92(d,2H),7.75(t,J＝27.5Hz,8H),7.62(d,2H),7.45(m,J＝65.0,25.0Hz,17H),7.27(t,1H),7.17(m,J＝5.0Hz,1H),7.06(d,1H).

Example 2: synthesis of compound a 2:

synthesis of compound 10: referring to the synthetic process and the post-treatment purification method of the compound 08, only the corresponding raw material needs to be changed. Mass spectrum: 446.55(M + H).

Synthesis of compound a 2: referring to the synthetic process and the post-treatment purification method of the compound a1, only the corresponding raw materials need to be changed, and 17.6g of a white solid compound a2 is obtained with a yield of 67.8%. Sublimation purification of 17.6g of crude A2 yielded sublimated A2 (12.2g, 69.3%). Mass spectrum: 774.96(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,2H),8.54(d,1H),8.43(m,J＝4.0Hz,6H),8.10(m,2H),7.92(d,2H),7.75(m,J＝27.5Hz,5H),7.62(m,2H),7.45(m,J＝65.0,25.0Hz,16H),7.27(d,1H),7.17(d,J＝5.0Hz,2H).

Example 3: synthesis of compound a 4:

synthesis of compound 12: referring to the synthesis process and the post-treatment purification method of the compound 03, only the corresponding raw materials need to be changed. Mass spectrum: 334.22(M + H).

Synthesis of compound 13: referring to the synthesis process and the post-treatment purification method of the compound 05, only the corresponding raw materials need to be changed. Mass spectrum: 365.87(M + H).

Synthesis of compound a 4: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 15.1g of a white solid compound A4 is obtained with a yield of 62.1%. Sublimation purification of 15.1g of crude A4 yielded sublimated A4 (9.87g, 65.36%). Mass spectrum: 774.96(M + H).¹H NMR(400MHz,CDCl₃)δ9.08(dd,2H),8.42(m,2H),8.29(t,2H),8.21(dd,2H),8.10(m,2H),7.88–7.71(m,6H),7.68(d,J＝15.0Hz,3H),7.62–7.32(m,16H),7.27(d,2H),7.17(m,J＝5.0Hz,2H).

Example 4: synthesis of compound a 21:

synthesis of compound 15: referring to the synthesis process and the post-treatment purification method of the compound 05, only the corresponding raw materials need to be changed. Mass spectrum: 289.8(M + H).

Synthesis of compound 17: referring to the synthetic process and the post-treatment purification method of the compound 08, only the corresponding raw material needs to be changed. Mass spectrum: 446.6(M + H).

Synthesis of compound a 21: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 13.2g of a white solid compound A21 is obtained with a yield of 64.8%. Sublimation purification of 13.2g of crude A21 yielded sublimated A21 (8.8g, 66.6%). Mass spectrum: 698.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.55–8.31(m,6H),8.10(m,2H),7.91(m,J＝10.0Hz,2H),7.86–7.31(m,17H),7.27(t,2H),7.17(dd,J＝5.0Hz,4H).

Example 5: synthesis of compound a 24:

synthesis of compound 20: to a 500ml three-necked flask, Compound 18(17.43g, 67.22mmol, 1.05eq), Compound 19(18g, 64.02mmol, 1.0eq), Pd were added in this order₂(dba)₃(1.17g，1.28mmol，0.02eq)，P(t-Bu)₃50% toluene solution (1.04g, 2.56mmol, 0.04eq), t-BuONa (9.23g, 96.04mmol, 1.5eq), dry toluene (150ml), vacuum, N under stirring₂The displacement is carried out for 3 times, the temperature is heated to 105 ℃, and the reaction is carried out for 6 hours. TLC monitored the completion of the starting material 19 reaction (DCM/Hex ═ 1:5 as developing solvent). Cooling to room temperature, adding 150ml of toluene into the reaction solution, continuing stirring for 1h until the reaction solution is clear, filtering the reaction solution with silica gel, leaching with a small amount of toluene, collecting the filtrate, concentrating the organic phase until only about 150ml of the organic phase remains, cooling to room temperature, slowly adding methanol (200ml), and stirring for crystallization for 2 h. Filtration and rinsing the filter cake with a small amount of methanol. Dissolving the obtained solid with THF (180ml) under heating, cooling, slowly adding methanol (180ml) dropwise, stirring for crystallizing for 2h, and vacuum filtering to obtain solid. Vacuum drying at 70 ℃ gave 20.07g of compound 20 as a pale yellow solid with a yield of 68.2%. Mass spectrum: 460.5(M + H).

Synthesis of compound a 24: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 12.4g of a white solid compound A24 is obtained with a yield of 63.03%. Sublimation purification of 12.4g of crude A24 yielded sublimated A24 (9.3g, 75%). Mass spectrum: 712.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.50–8.35(m,6H),8.15–7.87(m,7H),7.82–7.50(m,11H),7.39(t,J＝10.0Hz,7H),7.30(d,J＝15.0Hz,2H).

Example 6: synthesis of compound a 27:

synthesis of compound 22: referring to the synthesis process and the post-treatment purification method of the compound 05, only the corresponding raw materials need to be changed. Mass spectrum: 289.8(M + H).

Synthesis of compound a 27: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 14.2g of a white solid compound A27 is obtained with a yield of 58.9%. Sublimation purification of 14.2g of crude A27 yielded sublimated A27 (9.5g, 66.9%). Mass spectrum: 712.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.53–8.35(m,5H),8.18–7.86(m,7H),7.84–7.49(m,10H),7.46–7.32(m,4H),7.33–7.23(m,3H),7.17(d,J＝5.0Hz,2H).

Example 7: synthesis of compound a 33:

synthesis of compound 24: referring to the synthesis process and the post-treatment purification method of the compound 05, only the corresponding raw materials need to be changed. Mass spectrum: 289.8(M + H).

Synthesis of compound a 33: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 12.5g of a white solid compound A33 is obtained with a yield of 57.9%. Sublimation purification of 12.5g of crude A33 yielded sublimated A33 (7.9g, 63.2%). Mass spectrum: 712.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.85(dd,1H),8.39(m,J＝27.6,7.4Hz,5H),8.05(m J＝45.0,15.0Hz,5H),7.90(dd,1H),7.77(d,J＝22.0Hz,3H),7.73–7.47(m,8H),7.46–7.33(m,5H),7.32–7.22(m,3H),7.18(d,J＝5.0Hz,2H).

Example 8: synthesis of compound a 70:

synthesis of compound 27: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 419.5(M + H).

Synthesis of compound a 70: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 9.9g of a white solid compound A70 is obtained with a yield of 54.7%. Sublimation purification of 12.5g of crude A70 yielded sublimated A70 (6.8g, 66.6%). Mass spectrum: 672.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.95(dd,1H),8.70(dd,1H),8.50(m,1H),8.42(m,J＝13.0Hz,2H),7.90(t,J＝7.5Hz,3H),7.86–7.61(m,9H),7.55(m,6H),7.38(m,J＝20.0,10.0Hz,7H),7.18(dd,1H),6.93(d,1H).

Example 9: synthesis of compound a 72:

synthesis of compound a 2: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 419.5(M + H).

Synthesis of compound a 72: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 12.0g of a white solid compound A72 is obtained with a yield of 63.8%. Sublimation purification of 12.0g of crude A72 yielded sublimated A72 (8.7g, 72.5%). Mass spectrum: 672.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.95(dd,1H),8.70(dd,1H),8.50(m,1H),8.46–8.37(m,5H),8.10(m,2H),7.90(m,J＝7.5Hz,3H),7.82–7.58(m,7H),7.55(m,J＝5.0Hz,5H),7.35(m,J＝37.5,22.5Hz,7H).

Example 10: synthesis of Compound A81

Synthesis of compound a 81: referring to the synthetic process and the post-treatment purification method of the compound A1, the corresponding raw materials are changed to obtain 16.6g of a white solid compound A81 with a yield of 54.3%. Sublimation purification of 16.6g of crude A81 yielded sublimated A81 (11.9g, 71.6%). Mass spectrum: 672.8(M + H).¹H NMR(400MHz,CDCl₃)δ9.10(d,1H),8.95(dd,1H),8.85(dd,1H),8.50(m,1H),8.39(m J＝30.7,5.7Hz,5H),8.10(m,2H),7.89(d,J＝5.0Hz,2H),7.77(m,J＝9.1,5.9Hz,5H),7.70–7.49(m,7H),7.47–7.23(m,6H),7.17(d,J＝5.0Hz,2H).

Example 11: synthesis of Compound A118

Synthesis of compound 30: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 459.6(M + H).

Synthesis of compound a 118: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials were changed to obtain 9.3g of the compound a118 as a white solid with a yield of 61.2%. Sublimation purification of 9.3g of crude A118 yielded sublimated A118(6.7g, 72.1%). Mass spectrum: 711.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.55(dd,1H),8.45(m,J＝16.1Hz,2H),8.19(m,1H),7.91(m,J＝10.0Hz,2H),7.86–7.47(m,13H),7.39(m,J＝15.0,10.0Hz,5H),7.16(m,J＝27.5,17.5Hz,6H),7.04(m,1H),6.93(d,1H).

Example 12: synthesis of Compound A138

Synthesis of compound 32: to a 1L three-necked flask, were added compound 09(18g, 73.15mmol, 1.0eq), compound 31(21.1g, 74.61mmol, 1.02eq), Pd (dppf) Cl₂(1.07g，1.46mmol，0.02eq)、K₂CO₃(20.2g，146.3mmol，2.0eq)，1,4-Dioxane/H₂O mixed solvent (10/2, ca. 216ml), vacuum, N with stirring₂The replacement is carried out for 3 times, and the reaction is carried out for 8 hours by heating to 70 ℃. TLC monitored the starting material 09 reaction complete (DCM/Hex ═ 1:20 as developing solvent). Cooling the reaction liquid to room temperature, adding toluene (100ml), stirring for 0.5h, extracting, separating, collecting an organic phase, filtering the organic phase by using kieselguhr, leaching a filter cake by using a small amount of toluene, collecting filtrate, concentrating until about 100ml of the filtrate is remained, cooling to room temperature, slowly adding n-hexane (250ml), stirring and crystallizing for 3 h. Filtering, leaching a filter cake by using a small amount of n-hexane, collecting solid, and drying for 8 hours in vacuum at 60 ℃ to obtain 18.79g of white solid compound 32 with the yield of 71.9%. Mass spectrum: 358.2(M + H).

Synthesis of compound 33: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 536.5(M + H).

Synthesis of compound a 138: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 12.3g of the white solid compound a138 is obtained with a yield of 62.1%. Sublimation purification of 12.3g of crude A138 yielded sublimated A138(7.9g, 64.2%). Mass spectrum: 788.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.09(d,1H),8.92(d,1H),8.85(dd,1H),8.70(t,1H),8.49–8.30(m,4H),8.05(m,J＝45.0,15.0Hz,5H),7.90(s,1H),7.81(dd,1H),7.78–7.49(m,13H),7.37(m,J＝30.0,20.0Hz,9H).

Example 13: synthesis of Compound A150

Synthesis of compound 35: referring to the synthesis process and the post-treatment purification method of the compound 32, only the corresponding raw materials need to be changed. Mass spectrum: 358.2(M + H).

Synthesis of compound 36: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 536.5(M + H).

Synthesis of compound a 150: referring to the synthesis process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed to obtain 10.56g of a white solid compound A150,the yield thereof was found to be 77.2%. Sublimation purification of 10.56g of crude A150 yielded sublimated A150(6.4g, 60.6%). Mass spectrum: 788.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.05(d,1H),8.85(dd,1H),8.52–8.32(m,5H),8.29(d,1H),8.05(m,J＝45.0,15.0Hz,5H),7.90(dd,1H),7.81(dd,1H),7.75(s,2H),7.73–7.49(m,10H),7.39(m,J＝10.0Hz,6H),7.29(m,J＝20.0Hz,2H),7.17(m,J＝5.0Hz,2H).

Example 14: synthesis of Compound A158

Synthesis of compound 38: referring to the synthesis process and the post-treatment purification method of the compound 32, only the corresponding raw materials need to be changed. Mass spectrum: 358.2(M + H).

Synthesis of compound 40: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 535.6(M + H).

Synthesis of compound a 158: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 6.52g of the white solid compound a158 is obtained with a yield of 68.1%. Sublimation purification of 6.52g of crude A158 yielded sublimated A158(4.93g, 75.6%). Mass spectrum: 788.0(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.68(m,J＝21.6Hz,2H),8.53(m,J＝23.8Hz,2H),8.43(m,J＝5.0Hz,3H),8.19(m,1H),8.10(m,2H),7.91(m,J＝10.0Hz,2H),7.76(m,J＝5.0Hz,2H),7.70–7.57(m,5H),7.57–7.33(m,7H),7.27(s,2H),7.23–7.09(m,9H),7.04(s,1H).

Example 15: synthesis of Compound A159

Synthesis of compound 41: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 535.6(M + H).

Synthesis of compound a 159: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials were changed to obtain 6.94g of the white solid compound a159 with a yield of 65.5%. Sublimation purification of 6.94g of crude A159 yielded sublimated A159(5.1g, 73.4%). Mass spectrum: 788.0(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.55(dd,1H),8.52–8.35(m,7H),8.19(m,1H),8.10(m,2H),7.91(m,J＝10.0Hz,2H),7.78(dd,J＝30.0Hz,2H),7.72–7.61(m,3H),7.55(m,J＝12.5Hz,4H),7.41(m,J＝10.0Hz,2H),7.27(t,2H),7.24–7.09(m,9H),7.04(m,1H).

Example 16: synthesis of Compound A174

Synthesis of compound 42: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 496.6(M + H).

Synthesis of compound a 174: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials were changed to obtain 7.4g of the white solid compound a174 with a yield of 71.1%. Sublimation purification of 7.4g of crude A174 yielded sublimated A174(5.2g, 70.2%). Mass spectrum: 748.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.40(t,1H),9.07(d,1H),8.95(dd,1H),8.85(dd,1H),8.61(d,1H),8.50(m,1H),8.42(m,2H),8.36(d,J＝10.0Hz,2H),8.10(m,2H),7.89(d,J＝5.0Hz,2H),7.86–7.73(m,6H),7.73–7.49(m,10H),7.47–7.29(m,8H).

Example 17: synthesis of Compound A181

Synthesis of compound 44: referring to the synthesis process and the post-treatment purification method of the compound 32, only the corresponding raw materials need to be changed. Mass spectrum: 358.2(M + H).

Synthesis of compound 45: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 496.6(M + H).

Synthesis of compound a 181: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials were changed to obtain 6.3g of the white solid compound a181 with a yield of 62.1%. Sublimation purification of 6.3g of crude A181 yielded sublimed A181(4.2g, 66.6%). Mass spectrum: 748.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.95(dd,1H),8.70(dd,1H),8.46(t,J＝17.5Hz,3H),7.90(m,J＝7.5Hz,3H),7.86–7.75(m,6H),7.65(q,J＝5.0Hz,6H),7.55(s,6H),7.47–7.29(m,4H),7.27(dd,2H),7.17(m,J＝5.0Hz,4H),7.06(dd,1H).

Example 18: synthesis of Compound A94

Synthesis of compound 47: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 532.6(M + H).

Synthesis of compound a 94: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 6.1g of the white solid compound A94 is obtained with a yield of 57.0%. Sublimation purification of 6.1g of crude A94 yielded sublimate A94(4.3g, 70.4%). Mass spectrum: 784.9(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.41(m,J＝20.5Hz,2H),7.96–7.75(m,9H),7.75–7.61(m,4H),7.55(m,4H),7.47(dd,1H),7.43–7.29(m,4H),7.30–7.14(m,6H),6.93(d,1H),6.81(m,2H),6.43(dd,J＝11.5Hz,2H).

Example 19: synthesis of Compound A96

Synthesis of compound 48: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 532.6(M + H).

Synthesis of compound a 96: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials need to be changed, and 6.07g of a white solid compound A96 is obtained with a yield of 65.3%. Sublimation purification of 6.07g of crude A96 yielded sublimate A96(4.02g, 66.2%). Mass spectrum: 785.0(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),8.70(dd,1H),8.51–8.35(m,4H),8.26(d,1H),8.10(m,2H),8.02–7.83(m,6H),7.78(dd,J＝29.9Hz,2H),7.64(m,J＝17.5Hz,3H),7.55(dd,J＝5.0Hz,3H),7.44(dd,1H),7.36(m,J＝13.6Hz,3H),7.25(m,J＝11.8Hz,6H),6.95(m,2H),6.44(m,J＝17.7Hz,2H).

Example 20: synthesis of Compound A99

Synthesis of compound a 99: referring to the synthetic process and the post-treatment purification method of the compound a1, only the corresponding raw materials need to be changed, and 6.74g of the white solid compound a99 is obtained with a yield of 67.2%. Sublimation purification of 6.74g of crude A99 yielded sublimate A99(4.87g, 72.2%). Mass spectrum: 785.0(M + H).¹H NMR(400MHz,CDCl₃)δ9.11(d,1H),δ8.70(dd,1H),8.48–8.37(m,4H),8.34(d,1H),8.10(m,2H),7.96–7.79(m,9H),7.76(m,J＝13.7Hz,2H),7.71(m,J＝35.0Hz,1H),7.62(m,J＝10.0Hz,2H),7.55(m,J＝5.0Hz,2H),7.34(dd,1H),7.23(dt,J＝31.4,5.0Hz,9H),6.95(d,1H),6.26(dd,1H).

Example 21: synthesis of Compound A101

Synthesis of compound 50: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 532.6(M + H).

Synthesis of compound a 101: synthesis of reference Compound A1 and subsequent proceduresThe purification method was carried out by changing the corresponding raw materials to obtain 8.69g of the white solid compound A101 with a yield of 67.7%. Sublimation purification of 8.69g of crude A101 yielded sublimated A101(5.88g, 67.6%). Mass spectrum: 785.0(M + H).¹H NMR(400MHz,CDCl₃)δ9.01(d,1H),8.85(dd,1H),8.50–8.31(m,4H),8.10(m,2H),7.97–7.83(m,5H),7.84–7.73(m,6H),7.65(d,J＝25.0Hz,2H),7.55(m,3H),7.37(m,J＝10.8Hz,4H),7.24(m,J＝5.0Hz,5H),7.01(m,2H),6.50(dd,1H),6.38(d,1H).

Example 22: synthesis of Compound A108

Synthesis of compound 52: referring to the synthesis process and the post-treatment purification method of the compound 20, only the corresponding raw materials need to be changed. Mass spectrum: 459.6(M + H).

Synthesis of compound a 108: referring to the synthetic process and the post-treatment purification method of the compound A1, only the corresponding raw materials were changed to obtain 7.61g of the compound a108 as a white solid with a yield of 59.7%. Sublimation purification of 7.61g of crude A108 yielded sublimated A108(4.87g, 63.9%). Mass spectrum: 711.8(M + H).¹H NMR(400MHz,CDCl₃) δ 9.11(d,1H),8.70(dd,1H),8.55(dd,1H),8.50(d,1H),8.43(t, J ═ 2.5Hz,4H),8.24(d,1H),8.10(dd,2H),7.91(m, J ═ 10.0Hz,2H),7.75(dd, J ═ 2.3Hz,2H), 7.72-7.45 (m,12H),7.37(d,2H), 7.33-7.21 (m,3H),7.13(m, J ═ 25.0Hz,2H). Fabrication of organic electroluminescent devices

50mm 1.0mm glass substrate with ITO (100nm) transparent electrode was ultrasonically cleaned in ethanol for 10 minutes, dried at 150 ℃ and then subjected to N2 Plasma treatment for 30 minutes. The washed glass substrate was mounted on a substrate holder of a vacuum evaporation apparatus, and first, a compound HATCN was evaporated on the surface on the side of the transparent electrode line to cover the transparent electrode to form a thin film with a thickness of 5nm, then, a thin film with a thickness of 60nm was formed by evaporation of a HTM1 as HTL1, a thin film with a thickness of 10nm was formed by evaporation of a HTM2 as HTL2 on the HTM1 film, and then, a host material and a dopant material were evaporated on the HTM2 film in a co-evaporation mode (the dopant ratio was 2%), the film thickness was 25nm, and the host material and dopant material ratio was 90%: 10 percent. ETL (30nm) is sequentially evaporated on the light-emitting layer according to the formula of the following table to serve as an electron transport material, LiQ (1nm) is evaporated on the electron transport material layer to serve as an electron injection material, and Mg/Ag (100nm,1:9) is evaporated to serve as a cathode material in a co-evaporation mode.

Evaluation:

the above devices were subjected to device performance tests, and in each of examples and comparative examples, the luminescence spectrum was measured using a constant current power source (Keithley2400), a fixed current density was applied to a light emitting element, and a system of both spectral radiations (CS 2000). The voltage value and the time for which the test luminance was 90% of the initial luminance were measured at the same time (LT 90). The results are given in table 1 below:

table 1:

as can be seen from the comparison of the data in the above table, the compounds of the present invention applied to the organic electroluminescent device as the hole transport layer and the electron blocking layer show more excellent performance in driving voltage, light emitting efficiency and device lifetime than the comparative compounds.

The results show that the compound has the advantages of good light, electricity and thermal stability, high luminous efficiency, low voltage, long service life and the like, and can be used in organic light-emitting devices. Particularly, the organic electroluminescent material can be used as a hole transport layer material and an electron blocking layer material and can be applied to the AMOLED industry.