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A kind of 2,4-dihydroxybenzaldehyde amino acid aminoacid nickel catalyst, preparation method and application
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A kind of technology of dihydroxybenzaldehyde and nickel catalyst, applied in the directions such as catalytic reaction, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems such as undiscovered patent documents etc.
Inactive Publication Date: 2019-06-04
LIAOCHENG UNIV
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specific example 1
[0024] Specific example 1: Add 1 mmol of 2,4-dihydroxybenzaldehyde, 1.03 mmol of glycine, 20 mL of ethanol, and 5 mL of water in a clean round-bottomed flask, heat and stir at 75°C for 3 hours, cool to room temperature, and add chlorine Nickel 0.9mmol, a blue-green precipitate was formed, continued to stir for 4h, filtered after the reaction, the precipitate was dissolved with pyridine, and the filtrate was slowly evaporated at room temperature, and a blue rod-shaped substance was obtained after 4-5 days. The yield is about 68%.
specific example 2
[0025] Specific example 2: Add 1 mmol of 2,4-dihydroxybenzaldehyde, 1.2 mmol of aminoacetic acid, 20 mL of ethanol, and 5 mL of water in a clean round-bottomed flask, heat and stir at 75°C for 3 hours, cool to room temperature, and add chlorine Nickel 0.9mmol, a blue-green precipitate was formed, and the stirring was continued for 6h. After the reaction was completed, it was filtered, and the precipitate was dissolved with pyridine. The filtrate was slowly evaporated at room temperature, and a blue rod-shaped substance was obtained after 4-5 days. The yield is about 78%.
specific example 3
[0026] Specific example 3: Add 1 mmol of 2,4-dihydroxybenzaldehyde, 1.1 mmol of aminoacetic acid, 25 mL of ethanol, and 5 mL of water in a clean round-bottomed flask, heat and stir at 80°C for 3 hours, cool to room temperature, and add chlorine Nickel 1.1mmol, a blue-green precipitate was formed, continued to stir for 6h, filtered after the reaction, the precipitate was dissolved with pyridine, and the filtrate was slowly evaporated at room temperature, and a blue rod-shaped substance was obtained after 4-5 days. The yield is about 81%.
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Abstract
The invention belongs to the technical field of preparation of nickel catalyst materials, and particularly relates to a preparation method and application of 2,4-dihydroxy benzaldehyde amino acid nickel catalyst. The 2,4-dihydroxy benzaldehyde amino acid nickel catalyst has the advantages that the Biginelli reaction can be performed under the non-solvent condition, the product yield is up to 92%, and the preparation method of the catalyst is simple.
Description
technical field [0001] The invention belongs to the technical field of nickel catalyst material preparation, and in particular relates to a preparation method of a 2,4-dihydroxybenzaldehyde amino acid amino acid nickel catalyst and its application in Biginelli reaction. Background technique [0002] Schiff base is formed by the condensation of aldehydes or ketones and amine compounds. It is a very important class of nitrogen-containing compounds. Due to its relatively mild synthesis conditions, easy preparation, and special structure, and according to the flexibility of its reactants, it can change the reaction Many Schiff bases with variable structures and different properties can be derived by using the electron-donating groups and substituents of compounds. Therefore, there have been a large number of literature reports on its research. In addition to the crystal structure of Schiff bases, most of the current researches have gradually attracted widespread attention of sc...
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