Method for synthesizing 3, 6-dibromo-9-bromophenyl-9H-carbazole

A technology of phenylcarbazole and synthesis method, which is applied in the chemical field, can solve the problems of increasing the difficulty of purification, increasing the reaction cost, and dark color of the reaction solution, so as to avoid the coupling process and metal residues, reduce the discharge of three wastes, and the reaction conditions mild effect
CN112062709AActive Publication Date: 2020-12-11SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
Publication Date
2020-12-11

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Abstract

The invention discloses a method for synthesizing 3, 6-dibromo-9-bromophenyl-9H-carbazole, and belongs to the technical field of chemistry. The synthesis method comprises the following steps: dissolving N-phenyl carbazole and a bromination reagent in an organic solvent at room temperature, performing stirring, adding an oxidant, performing reacting for 4-8 hours, recovering the solvent after the reaction is finished, performing extracting, desolventizing and recrystallizing an organic layer to obtain 3, 6-dibromo-9-bromophenyl-9H-carbazole, and controlling the temperature of the reaction system to be lower than the boiling point of the organic solvent. According to the preparation method, a one-step method is adopted at room temperature, commercially available N-phenylcarbazole is used asa raw material, under the action of a bromination reagent and an oxidizing agent, tribromo NPC can be obtained with high yield and high purity, and the method is mild and simple in condition, simple to operate, low in cost, high in yield and beneficial to industrial production of enterprises.
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Description

technical field

[0001] The invention relates to the technical field of chemistry, in particular to a method for synthesizing tribromo-N-phenylcarbazole by oxidative bromination of N-phenylcarbazole. Background technique

[0002] Organic electrophosphorescent light-emitting devices (PhOLEDs), which are materials with a host-guest structure, have extremely high application potential in the fields of display and lighting. Carbazole has π-electron conjugated system, intramolecular electron transfer characteristics and lone pair electron heteroatoms, so carbazole and its derivatives have strong charge transport ability and photoelectric performance. A single carbazole molecule has poor photoelectric properties due to its weak conjugation system. Therefore, it is usually necessary to modify the carbazole site by bromination to realize the arylation / heteroarylation of the carbazole site, further expand the electronic conjugated system, and improve the charge transport ability. 3,...

Claims

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