Method for preparing N-vinyl carbazole

A technology of vinyl carbazole and carbazole, which is applied in the field of synthesis of organic compounds, can solve the problems of low product purity, complicated methods, and high cost, and achieve the effects of simple process, high product yield, and low cost

Inactive Publication Date: 2014-11-05
NANTONG HUAFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the main methods for synthesizing N-vinylcarbazole are complicated, costly, and the yield is low, and the product purity is not high; therefore, in order to solve the above problems, a new technical solution is specially provided

Method used

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  • Method for preparing N-vinyl carbazole
  • Method for preparing N-vinyl carbazole
  • Method for preparing N-vinyl carbazole

Examples

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Embodiment

[0017] Weigh 50 g of carbazole and dissolve it in 100 ml of DMSO (dimethyl sulfoxide), and heat to completely dissolve it. The solution was poured into a 500ml three-necked flask, and 2g of potassium hydroxide was added to the solution. Raise the temperature to 160°C, start feeding acetylene until the raw material is completely consumed (TLC (PE:EA=10:1)), cool, remove DMSO by distillation under reduced pressure, and then collect the product N at 175°C / 5mmHg by vacuum distillation with a Roots pump - Vinylcarbazole. Finally, 46.2 g of pure product was obtained (yield 80%).

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Abstract

The invention discloses a method for preparing N-vinyl carbazole. The method comprises the following reactions: carrying out a reaction of carbazole and acetylene to produce N-vinyl carbazole under conditions of taking DMSO as a solvent and adjusting the pH value with KOH, wherein the reaction temperature is 160-170 DEG C. The method has the advantages of simple process, easy operation, low cost, and high product yield.

Description

technical field [0001] The invention relates to a synthesis of organic compounds, in particular to a method for preparing N-vinyl carbazole. Background technique [0002] The molecular formula of N-vinylcarbazole is C14H11N. The application of N-vinylcarbazole is a record-setting achievement for the production of low-silver-containing photographic materials, the manufacture of highly sensitive silver-free media, and new recording systems and processes. [0003] The polymer of N-vinyl carbazole is a photoconductive organic material, and the electrophotographic photosensitive plate coated with it has a good copy effect on blue-purple drawings and images with more tonal levels; The thermoplastic holographic image of the invention does not need to be made in a darkroom, and can be displayed and reused in situ; the light radical polymerization photosensitive material prepared with it has a sensitivity as high as that of a silver salt material, and can be used for rapid photograph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86
CPCC07D209/86
Inventor 王德峰张耀兵石朗银
Owner NANTONG HUAFENG CHEM
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