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A benzocarbazole and benzo-based technology, which is applied in the field of chemical material preparation, can solve the problems of expensive raw materials, decreased yield, limited scale production and the like, achieves low preparation cost, low production cost, and solves harsh preparation conditions Effect
Inactive Publication Date: 2019-10-08
安徽秀朗新材料科技有限公司
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[0017] This method also has expensive raw materials, and at the same time, in the coupling reaction, bromine will participate in the competition of iodine, resulting in a decrease in yield and limiting large-scale production
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[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0063] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or t...
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Abstract
The invention discloses a 10-bromo-7H-benzo[c]carbazole preparation method. 10-bromo-7H-benzo[c]carbazole is prepared from 260g of 2-naphthol, 520g of hydrazine hydrate (80%), 500g of clear water, 750ml of methylbenzene, 100ml of concentrated hydrochloric acid, 164g of 2-naphthylhydrazine hydrochloride, 968ml of methanol, 91g of cyclohexanone, 250ml of cold methanol, 98.3g of 5,6,7,8-tetrahydro-3,4-benzocarbazole, 700ml of methylbenzene, 201.9g of DDQ, 200ml of ethyl alcohol, 65.1g of benzo[c]carbazole, 600ml of dichloromethane, 54g of NBS, 450ml of methylbenzene and 3g of activated carbon, and a plurality of four-neck reaction flasks are required. The method includes steps: subjecting 2-naphthol and two times of weight of hydrazine hydrate (80%) to reflux reaction for 20h, and treating with diluted hydrochloric acid to obtain 2-naphthylhydrazine hydrochloride. The method is low in pollution and cost and high in yield; by adoption of cheap and easily acquirable raw materials, a targetcompound is obtained through four-step reaction, and the total yield of products is high. In addition, a process is simple in operation, less discharge of wastewater, waste gas and industrial residuesis realized, and the method is suitable for large-scale production.
Description
technical field [0001] The invention relates to the technical field of preparation of chemical materials, in particular to a preparation method of 10-bromo-7H-benzo[c]carbazole. Background technique [0002] Carbazole derivatives are typical electron-rich groups, so carbazole derivatives have good hole transport ability and high luminescence ability, and because of their large rigid planar structure, group movement is difficult, which can effectively improve the Glass transition temperature (Tg). Therefore, carbazole derivatives are a class of materials with high Tg, high luminous intensity and good hole transport properties, and can be used as hole transport materials and luminescent materials. [0003] 10-Bromo-7H-benzo[c]carbazole is an important organic light-emitting material intermediate, which can be further synthesized into organic optoelectronic materials, which have been widely used in organic light-emitting diodes (OLEDs). [0004] The preparation method of 10-b...
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