Organic electroluminescent material and organic luminescent device thereof

[0043] The preparation method of an organic electroluminescent material of the present invention includes the following route reaction of the raw materials to produce an organic electroluminescent material of formula I:

[0044]

[0045] Where R 1 , R 2 Independently selected from substituted or unsubstituted C6-C50 aryl groups, substituted or unsubstituted C6-C50 aromatic amines, substituted or unsubstituted C6-C50 aryl ethers, substituted or unsubstituted C3-C50 heteroaryl groups One kind

[0046] L is selected from one of substituted or unsubstituted sulfone groups, substituted or unsubstituted phosphino groups, substituted or unsubstituted carbonyl groups, and substituted or unsubstituted C3-C50 heteroaryl groups;

[0047] The heteroatom in the heteroaryl group is at least one of B, N, O, S, Si or P.

[0048] The present invention also provides an organic light-emitting device, and the organic light-emitting device may be an organic light-emitting device well known to those skilled i

[0049] Example 1: Preparation of Compound 1

[0050]

[0051] Step1. Take 100mmol 3-bromo-9H-fluorenone, add 1 equivalent of 3-thiol-9H-fluorenone, 300mmol potassium tert-butoxide, 1mmol Pd 2 (dba) 3 , Toluene and argon were replaced three times, 1mmol of tri-tert-butylphosphine was added, and argon was replaced three times, and reacted for 10h at reflux temperature. The crude product was passed through a silica gel column to obtain 72mmol of compound 1-1.

[0052] Step2. Take 72mmol of compound 1-1, dissolve it in DCM, cool to 0 degrees Celsius, add 2 equivalents of m-CPBA, gradually warm to room temperature, stir and react for 6 hours, after the reaction is complete, wash with saturated anhydrous sodium bisulfite , The organic phase is dried and spin-dried, and the obtained product is passed through a silica gel column to obtain 1-250 mmol of the target product.

[0053] Step3. Take 50mmol 1-2, add toluene to dissolve, add 2.5 equivalents of 4-methylbenzenesulfonyl hydrazide, react at

[0054] Example 2: Preparation of Compound 6

[0055] The synthesis method is the same as in Example 1, and phenylboronic acid is replaced by: