A method for synthesizing 9-bromoanthracene

By using a mild bromination reaction of inorganic bromide salts and hydrogen peroxide, combined with composite Lewis acid catalysis and mixed solvents, the safety, environmental protection, purity, and yield issues in the synthesis of 9-bromoanthracene have been resolved, enabling efficient and low-cost industrial production suitable for high-end applications such as OLEDs.

CN122010676BActive Publication Date: 2026-06-26GANSU VISINO NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GANSU VISINO NEW MATERIAL CO LTD
Filing Date
2026-04-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The existing 9-bromoanthracene synthesis process has problems such as safety hazards, high environmental pressure, poor selectivity, difficulty in removing by-products, high cost, and inability to be industrialized, making it difficult to meet the industrial production requirements of high purity, high yield and low cost.

Method used

Using inorganic bromide salts as the bromine source and hydrogen peroxide as the oxidant, combined with a composite Lewis acid catalytic system and a mixed solvent, active bromine species are generated through a mild isothermal reaction. This is then combined with a stepwise recrystallization purification process to achieve efficient conversion of anthracene and effective separation of byproducts.

Benefits of technology

It achieves zero highly toxic exhaust gas, low solid waste emissions, high product purity, high yield, and low cost, making it suitable for industrial production and meeting the quality requirements of high-end applications such as OLED.

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Abstract

The application discloses a synthesis method of 9-bromoanthracene and belongs to the technical field of organic synthesis. Anthracene is used as raw material, inorganic bromide salt is used as a bromine source, hydrogen peroxide is used as an oxidant, and 9-bromoanthracene is synthesized in a mixed solvent under the catalysis of a composite Lewis acid with high selectivity; the crude product is purified through step-by-step fractional recrystallization to obtain a high-purity product. Through the synergistic effect of the composite catalytic system and the mixed solvent, the generation of the difficult-to-remove by-product 9,10-dibromoanthracene is inhibited from the source, and the efficient separation of the product and the key impurities can be realized without column chromatography by combining the gradient cooling fractional crystallization process. The process is green and safe, simple to operate, low in cost and easy to industrialize, and the prepared 9-bromoanthracene can meet the application requirements in high-end fields such as OLED photoelectric materials.
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