Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for synthesizing N-vinylcarbazole

A technology of vinyl carbazole and carbazole, which is applied in the field of synthesis of N-vinyl carbazole, which can solve the problems of long steps, increased risk factor, and impact on yield, and achieves the effects of mild reaction conditions, low cost, and easy operation

Active Publication Date: 2019-10-29
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, the main substrate of the method (1)(2)(3) reaction is gas, which requires high temperature and high pressure, increases the risk factor, has high requirements for equipment, and increases the cost, and the method (3) has long steps and low yield. Lower; method (4) step-by-step reaction increases experimental difficulty, affects yield, and product purity is not high simultaneously; the price of method (5) raw material trimethylsilyl acetylene is expensive, and cost is too high, is not suitable for suitability for suitability for industrialized production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesizing N-vinylcarbazole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First add 300ml of ethanol solvent into the 500ml reaction bottle, then add 83g of carbazole, 30g of potassium hydroxide, and 46g of methyl butynol in turn under stirring, gradually raise the temperature to 75°C, and detect the reaction progress by gas phase. When the gas phase peak of the raw material carbazole Completely disappear to stop the reaction, carry out vacuum distillation to remove most of the solvent, then suction filter and wash with water to obtain 88 g of solid crude product (yield 91%).

[0017] The solid crude product was completely dissolved in an appropriate amount of ethanol heated to reflux, and then left to stand at room temperature, white crystals were precipitated, filtered, and dried at room temperature to obtain 78 g of white crystals (yield 81%).

Embodiment 2

[0019] First add 1.2L of ethanol solvent to the 2L reaction flask, then add 334g of carbazole, 120g of potassium hydroxide, and 185g of methyl butynol successively under stirring, and gradually raise the temperature to 80°C. The reaction was stopped when the peak disappeared completely, and most of the solvent was removed by distillation under reduced pressure, then suction filtered and washed with water to obtain 348 g of solid crude product (yield 90%).

[0020] The solid crude product was completely dissolved in an appropriate amount of ethanol that was heated to reflux, and then allowed to stand at room temperature. White crystals were precipitated, filtered, and dried at room temperature to obtain 309 g of white crystals (80% yield).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a novel method for synthesizing N-vinylcarbazole, and belongs to the field of organic synthesis. The method comprises the steps that under the KOH alkaline condition, carbazoleand methylbutynol react in an ethanol solvent to generate the N-vinylcarbazole, and the reaction temperature is 75-80 DEG C. The novel method has the advantages of mild condition, easy and convenientoperation, safety, low cost, high yield and the like.

Description

technical field [0001] The invention relates to a method for synthesizing N-vinyl carbazole, which belongs to the field of organic synthesis. Background technique [0002] N-vinyl carbazole is an important nitrogen-containing aromatic heterocyclic compound, which has special photoelectric properties, which is consistent with the performance of organic photoelectric functional materials, has a strong intramolecular electron transfer function, and its thermal stability is also Better, it is an important intermediate in the synthesis of photoelectric materials, and is widely used in liquid crystal display materials. [0003] At present, N-vinyl carbazole has been applied to the synthesis of polyvinyl carbazole (PVK). PVK is a classic and important polymer mainly conducting hole conduction. Purple drawings and images with more tonal levels have better copy effects; thermoplastic holographic pictures coated with it can be developed and reused in situ without darkroom operation; ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86
CPCC07D209/86Y02E10/549
Inventor 刘长春周洋代本才沈志浩霍萃萌柴存才陈瑨陈杰英马伟
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD