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Synthetic method of novel liquid crystal material 3-butoxy-N,N-dimethylpropanamide

A technology of dimethylpropionamide and dimethylacrylamide, which is applied in the field of material synthesis, can solve the problems of long synthesis route, high cost, low yield and the like, and achieves low environmental impact, strong operability and simple source of raw materials. Effect

Inactive Publication Date: 2015-04-01
PINGHU UCON PHARMA R&D
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Problems solved by technology

But the existing 3-butoxy-N, N-dimethylpropionamide synthetic route is long, and cost is high, and productive rate is low

Method used

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  • Synthetic method of novel liquid crystal material 3-butoxy-N,N-dimethylpropanamide

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific examples.

[0017] Reaction equation of the present invention is as follows:

[0018]

[0019] The synthetic steps of the present invention at least include:

[0020] Step 1: Condensation reaction:

[0021] In a 50-liter circulating heating jacketed reactor, add 10 kg of n-butanol, under stirring, add 0.5 kg of catalytic amount of sodium tert-butoxide, and heat to 80°C. Slowly add 11.1 kg of N,N-dimethylacrylamide dropwise, the temperature is controlled at 78°C-82°C, and the dropwise addition time is about 5-8 hours. After the dropwise addition, keep the temperature at 80°C for 12-15 hours. Treatment: 1) Central control, when the raw material is less than 3%, stop heating. 2) Cool down and proceed to the next step.

[0022] Step 2: Refining:

[0023] Distillation: Under the high vacuum of the mechanical vacuum pump, the product is extracted from 21 kg of crude product ...

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Abstract

The invention discloses a synthetic method of novel liquid crystal material 3-butoxy-N,N-dimethylpropanamide. The synthetic method comprises following steps at least: step 1, condensation reaction, wherein n-butyl alcohol is mixed with an alkali, N,N-dimethylpropanamide is added dropwise at heating conditions for reaction, and a crude product (1) is obtained after a certain time of reaction; and step 2, refining, wherein the crude product (1) is subjected to heating and vacuum rectifying column separation so as to obtain qualified product 3-butoxy-N,N-dimethylpropanamide. Raw material source of the synthetic method is simple; high temperature and high pressure are not needed; the synthetic method is safe and reliable; operationality is high; and influence on the environment is less.

Description

technical field [0001] The invention relates to a synthesis process of a novel liquid crystal material 3-butoxy-N, N-dimethylpropionamide (3-Butoxy-N, N-Dimethylpropionamide), belonging to the field of material synthesis. Background technique [0002] 3-Butoxy-N, N-dimethylpropionamide (3-Butoxy-N, N-Dimethylpropionamide) is a kind of liquid crystal screen material, and its structural formula is: [0003] [0004] 3-Butoxy-N, N-dimethylpropionamide is a relatively novel liquid crystal material. Compared with traditional fluoride liquid crystal materials, it has the following advantages: it has little impact on the human body, does not pollute the environment, and the finished liquid crystal panel High-resolution. However, the existing 3-butoxy-N,N-dimethylpropionamide has a long synthetic route, high cost and low yield. Contents of the invention [0005] The present invention provides a kind of synthetic route short to above-mentioned problem, and cost is low...

Claims

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Application Information

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IPC IPC(8): C07C231/12C07C235/06C09K19/06
Inventor 忻华钟全发史黎辉
Owner PINGHU UCON PHARMA R&D
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