646-24-2Relevant articles and documents
Synthesis method of 1,9-diaminononane
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Paragraph 0048; 0052; 0050; 0051; 0054; 0055, (2019/03/26)
The invention relates to a synthesis method of 1,9-diaminononane. The synthesis method comprises the following steps: 1) in the presence of an acid catalyst or an alkali catalyst, carrying out a condensation reaction on 1,5-glutaraldehyde with cyanoacetic acid or cyanoacetate to generate an intermediate A; 2) in the presence of no catalyst or in the presence of an inorganic base catalyst or an organic amine catalyst, directly carrying out a decarboxylation reaction on the intermediate A, or carrying out a decarboxylation reaction after hydrolysis to obtain an intermediate B; and 3) in the presence of a hydrogenation reduction catalyst, carrying out a hydrogenation reaction on the intermediate B to generate the final product 1,9-diaminononane.
Synthetic method of 1,9-diaminononane
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Paragraph 0056; 0062; 0063-0065, (2018/11/22)
The invention provides a synthetic method of 1,9-diaminononane. The method comprises the following steps: firstly, carrying out condensation reaction on undecanoic acid and transforming the undecanoicacid into a derivative of the undecanoic acid; then carrying out ammoniation to generate undecendiamide, and then carrying out Hofmann rearrangement reaction to generate a target product 1,9-diaminononane. The method disclosed by the invention has the advantages that raw materials are inexpensive and easily obtained and have a sufficient supply, and high-temperature and high-pressure reaction conditions are not involved, and a production process has more security. Compared with an abroad production technology, the synthetic method disclosed by the invention has the advantages of less side reaction, high purity of the product, less reaction steps and low requirement on equipment. Compared with a production process reported by domestic companies, the synthetic method has the advantages of less three wastes, and meanwhile, hydrogenation reaction is not involved, and the synthetic method has higher reaction security.
METHOD FOR PRODUCING ALKANOL AMINES BY HOMOGENEOUSLY CATALYZED ALCOHOL AMINATION
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Paragraph 0088; 0103, (2016/10/27)
PROBLEM TO BE SOLVED: To provide a method for producing alkanol amines by alcohol amination of diols using ammonia under elimination of water. SOLUTION: The invention relates to a method for producing alkanol amines which comprise a primary amino group (-NH2) and a hydroxyl group (-OH), by alcohol amination of diols comprising two hydroxyl groups (-OH) using ammonia under elimination of water. The reaction is homogeneously catalyzed in the presence of at least one complex catalyst which contains at least one element selected from groups 8, 9 and 10 of the periodic table and at least one donor ligand. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPO&INPIT