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Ru (II)-Salen metal complexes and preparation methods thereof

A technology of metal complexes and complexes, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, oxidation preparation of carbonyl compounds, etc. Environmental pollution and other problems, to achieve good catalytic effect, mild reaction conditions, clear structure effect

Inactive Publication Date: 2015-07-29
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

These oxidants have low atomic utilization and large discharge of three wastes, some of which are harmful to human body and seriously pollute the environment.

Method used

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  • Ru (II)-Salen metal complexes and preparation methods thereof
  • Ru (II)-Salen metal complexes and preparation methods thereof
  • Ru (II)-Salen metal complexes and preparation methods thereof

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Embodiment Construction

[0018] Below in conjunction with embodiment the present invention is described in detail:

[0019] 1. Preparation method and reaction conditions of novel Ru(II)-Salen metal complexes with catalytic alcohol oxidation reaction

[0020] a) Preparation of Ru(DMSO) 4 Cl 2 metal precursors. RuCl 3 ·3H 2 O (0.8mmol, 0.21g) was dissolved in 4ml of DMSO solution, refluxed under argon protection for 5min, after cooling to room temperature, the solvent was concentrated by rotary evaporation, 4mL of acetone solution was added, left standing overnight in the refrigerator, suction filtered, washed with acetone, A yellow solid product was obtained as Ru(DMSO) 4 Cl 2 metal precursors.

[0021] b) Preparation of the Salen ligand. Salicylaldehyde (4mmol, 0.488g) and ethylenediamine (2mmol, 0.12g) were dissolved in 12mL and 8mL ethanol solution respectively, and the ethylenediamine solution was added dropwise to the salicylaldehyde solution under ice-bath stirring. After the dropw...

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Abstract

The invention provides Ru (II)-Salen metal complexes and preparation methods thereof, and relates to metal complexes and preparation methods thereof. According to the three Ru (II)-Salen metal complexes, Ru(DMSO)4Cl2 is taken as the metal precursor, and Salen ligands are H2L<1>, H2L<2> and H2L<3> obtained through condensation reactions of ethanediamine with salicylaldehyde, 5-bromosalicylaldehyde and hydroxyacetophenone respectively. The three Ru (II)-Salen metal complexes Ru(DMSO)2(H2L<1>), Ru(DMSO)2(H2L<2>) and Ru(DMSO)2(H2L<3>) are prepared with a step-by-step synthesis technique by changing conditions of each reaction process. The three novel complexes have clear structures as well as stability on water and air; the reaction conditions are mild and the post-processing is simple in catalysis of oxidizing reaction of alcohol, and the three Ru (II)-Salen metal complexes have good catalytic activity and selectivity.

Description

technical field [0001] The invention belongs to a metal organic catalyst and a preparation method thereof, in particular to a Ru(II)-Salen metal complex capable of catalyzing an alcohol oxidation reaction and a preparation method thereof. technical background [0002] Transition metal ruthenium is a classic catalyst, which has been widely used in catalytic reactions such as oxidation, coupling, and olefin metathesis, and has been a research hotspot in the field of catalysts for many years. Oxidation reactions catalyzed by ruthenium have also been extensively studied in recent years. It has high catalytic efficiency, has important applications in organic synthetic chemistry, and has broad application prospects in the field of pharmaceutical synthesis. In addition, the reactions of C-O, C-N, and C-C bonds formed by oxidative dehydrogenation catalyzed by ruthenium, and the ring-opening reactions of C-C bond cleavage are also of great significance in heterocyclic chemis...

Claims

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Application Information

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IPC IPC(8): C07F15/00B01J31/22C07C47/54C07C45/29
Inventor 丁茯岳秋杰向朝霞孙亚光
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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