Synthesis method of 3-methoxyl-N, N-dimethylacrylamide
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A dimethylpropionamide and synthesis method technology, applied in the synthesis of 3-methoxy-N,N-dimethylpropionamide, and in the field of synthesis of chemical material intermediates, can solve difficult processing, high energy consumption, The process is cumbersome and other problems, to achieve the effect of simple reaction, low energy consumption and simple operation
Active Publication Date: 2017-06-23
LINHAI LIANSHENG CHEM
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[0007] For example, the Chinese patent (application number: 201380019269.8) discloses a method for the manufacture of β-alkoxypropionamides, in which β-alkoxy acrylates are reacted with amines to produce β-alkoxypropionamides , but this method uses β-alkoxy acrylates as raw materials and reacts with amines. After the rea
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[0037] The following are specific embodiments of the present invention to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.
[0038] According to the parameters in Examples 1-38 and Comparative Examples 3-20 in Table 1, 3-methoxy-N,N-dimethylpropionamide was synthesized using the following method of the present invention:
[0039] S1, Synthesis of 3-methoxypropionitrile: add acrylonitrile, anhydrous methanol and metal alkoxide to the reactor to perform alkoxylation reaction, and then recover unreacted anhydrous methanol to obtain 3-methoxy Propionitrile
[0040] S2, the synthesis of 3-methoxypropionic acid: adding acidic catalyst and water to the 3-methoxypropionitrile in step S1, and heating for hydrolysis reaction to obtain 3-methoxypropionic acid;
[0041] S3. Synthesis of 3-methoxy-N,N-dimethylpropionamide: Add 3-methoxypropionic acid and dimethylamine into a closed reactor, and react at elevated tempe...
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Abstract
The invention relates to a synthesis method of 3-methoxyl-N, N-dimethylacrylamide, and belongs to the technical field of chemical synthesis. The synthesis method comprises the following steps of adding 3-methoxypropionic acid and dimethylamine into a sealed reactor; raising the temperature to 80 to 150 DEG C; performing reaction to obtain 3-methoxyl-N, N-dimethylacrylamide, wherein the pressure in the sealed reactor is 0.1 to 10.0MPa. The 3-methoxypropionic acid is used as the raw materials to perform high-temperature dewatering with dimethylamine in a sealed reaction vessel; polyhydric alcohol and basic catalysts are not needed; the reaction is simple; the implementation is easy; the yield of a product is high; the purity is high; the high yield is realized; meanwhile, the pollution is little; the cost is low; the method conforms to the requirements of modern chemical green synthesis. Meanwhile, the 3-methoxypropionic acid uses low-price acrylonitrile as the starting raw materials; the acrylonitrile is subjected to alkoxylation to obtain methoxyl propionitrile; then, hydrolysis is performed. The operation is simple; the energy consumption is low.
Description
technical field [0001] The invention relates to a synthesis method of a chemical material intermediate, in particular to a synthesis method of 3-methoxy-N,N-dimethylpropionamide, which belongs to the technical field of chemical synthesis. Background technique [0002] 3-methoxy-N,N-dimethylpropionamide (structural formula shown in formula I), is a colorless and transparent solvent, has amide groups and alkyl groups, can be mixed with various solvents, can Highly soluble polymer polyamide; it has the characteristics of high solubility, high permeability, high fluidity, low viscosity, low surface tension, etc., and is not irritating to the skin, safe and environmentally friendly, and can be a good substitute for the traditional solvent N-formazan Pyrrolidone is widely used in electronics, medicine, pesticides, pigments, cleaning agents, insulating materials and other industries. Nowadays, in the increasingly competitive safe solvent market, in addition to solubility, high vol...
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