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Method for synthesizing 3-iodine-phenylcarbazole

A technology of phenylcarbazole and synthetic method, which is applied in the direction of organic chemistry, can solve the problems of complex production process, high production cost, serious pollution, etc., and achieve the effects of high controllability, increased yield, and less pollution

Inactive Publication Date: 2011-04-27
山东盛华新材料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, liquid crystal display has been widely used because of its small size and energy saving, but due to the limitation of the characteristics of liquid crystal itself, it can no longer meet the current needs; organic electroluminescent material (OLED), as a new type of liquid crystal display technology, is becoming more and more popular. be valued
3-iodo-9-phenylcarbazole is a kind of intermediate of (OLED), and 3-iodo-9-phenylcarbazole is (OLED) existing production technology is comparatively complicated, and yield is low, and production cost is high, and serious pollution

Method used

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  • Method for synthesizing 3-iodine-phenylcarbazole
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  • Method for synthesizing 3-iodine-phenylcarbazole

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Embodiment

[0011] Embodiment, the synthetic method of 3-iodo-phenylcarbazole, take carbazole as starting raw material, under the effect of catalyst cuprous oxide with iodobenzene, through Ullman reaction, synthesize 9-phenylcarbazole, react The medium reflux temperature is 144°C to 146°C. When the raw material carbazole GC is less than 1.5%, the reaction is stopped, and the temperature is lowered to 90°C. The obtained crude product is dissolved in dichloroethane, filtered, and the filter cake is rinsed with dichloroethane. The washing liquid and the filtrate are combined, passed through the column at normal temperature and pressure, filtered, drained, and dried, and the 9-phenylcarbazole and iodine undergo an iodo reaction under the catalysis of iodic acid and concentrated sulfuric acid. The iodo reaction is an alternate iodine addition acid, the temperature was raised to 70~75°C, when the product 3-iodo-9-phenylcarbazole GC>78% and diiodide GC<8%, the reaction was stopped, the temperatur...

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Abstract

The invention discloses a method for synthesizing 3-iodine-phenylcarbazole, which comprises the following steps of: synthesizing 9-phenylcarbazole by performing Ullmann reaction on carbazole serving as an initial raw material and phenyl iodide under the action of cuprous oxide serving as a catalyst; and synthesizing a target compound 3-iodine-phenylcarbazole by performing iodo-reaction on the 9-phenylcarbazole and iodine under the catalysis of iodic acid and concentrated sulfuric acid. The synthesis method has the characteristics of high yield, low production cost and low pollution, and is simple.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a synthesis method of 3-iodo-phenylcarbazole. Background technique [0002] At present, liquid crystal display has been widely used because of its small size and energy saving, but due to the limitation of the characteristics of liquid crystal itself, it can no longer meet the current needs; organic electroluminescent material (OLED), as a new type of liquid crystal display technology, is becoming more and more popular. be valued. 3-iodo-9-phenylcarbazole is a kind of intermediate of (OLED), and 3-iodo-9-phenylcarbazole is (OLED) existing production technology is comparatively complicated, and yield is low, and production cost is high, And the pollution is serious. Contents of the invention [0003] The purpose of the present invention is to improve the deficiencies of the prior art and provide a synthetic method of 3-iodo-phenylcarbazole with simple synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86
Inventor 李企贵王金荣刘春伟王觉王作鹏
Owner 山东盛华新材料科技股份有限公司
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