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Supported gold catalyst, its preparation and its application

A gold catalyst and supported technology, which is applied in the field of chemical catalytic materials and chemical applications, can solve the problems of serious environmental pollution, environmental pollution, loss of metal catalysts, etc., and achieve the effects of less consumption of precious metals, good catalytic activity, and mild reaction conditions

Inactive Publication Date: 2014-03-19
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the related reactions catalyzed by homogeneous Au(I) have the disadvantages that the catalyst is difficult to recycle, which inevitably causes the loss of the metal catalyst and the pollution to the environment, which does not meet the development requirements of green chemistry, especially the catalyst is not recyclable, and the product is easy to produce. Residual heavy metals, serious environmental pollution and other shortcomings limit its further development

Method used

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  • Supported gold catalyst, its preparation and its application
  • Supported gold catalyst, its preparation and its application
  • Supported gold catalyst, its preparation and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Chloromethylation of ordered mesoporous phenolic resin

[0034] Mix 20 grams of ordered mesoporous phenolic resin with 100 grams of chloromethyl ether and 21 grams of aluminum chloride (added three times with an interval of 1 hour each time) at a temperature of 0°C, and then proceed for 12 hours under argon protection Chloromethylation reaction to prepare a chloromethylated ordered mesoporous phenolic resin, the reaction temperature of which is 25°C.

[0035] b. Phosphine ligand functionalization of ordered mesoporous phenolic resin

[0036] Dissolve 48 grams of diphenylphosphonium chloride in 89 grams of anhydrous tetrahydrofuran, add 2 grams of lithium and stir for 3 hours, add the resulting solution to 32 grams of the chloromethylated ordered mesoporous phenolic resin prepared above, and continue the reaction After 12 hours, an ordered mesoporous phenolic resin functionalized with phosphine ligands was prepared.

[0037] c. Preparation of supported gold catalyst

[0038] ...

Embodiment 2

[0040] a. Chloromethylation of ordered mesoporous phenolic resin

[0041] Mix 20 grams of ordered mesoporous phenolic resin with 100 grams of chloromethyl ether and 21 grams of aluminum chloride (added three times with an interval of 1 hour each time) at a temperature of 0°C, and then proceed for 12 hours under argon protection Chloromethylation reaction to prepare a chloromethylated ordered mesoporous phenolic resin, the reaction temperature of which is 25°C.

[0042] b. Phosphine ligand functionalization of ordered mesoporous phenolic resin

[0043] 78 g of bis(4-trifluoromethyl)phenylphosphonium chloride was dissolved in 89 g of anhydrous tetrahydrofuran, 2 g of lithium was added and the reaction was stirred for 3 hours, and the resulting solution was added to the chloromethylated ordered medium prepared above. 32 grams of porous phenolic resin, continued to react for 12 hours, prepared ordered mesoporous phenolic resin functionalized with phosphine ligands.

[0044] c. Preparatio...

Embodiment 3

[0047] a. Chloromethylation of ordered mesoporous phenolic resin

[0048] Mix 20 grams of ordered mesoporous phenolic resin with 100 grams of chloromethyl ether and 21 grams of aluminum chloride (added three times with an interval of 1 hour each time) at a temperature of 0°C, and then proceed for 12 hours under argon protection Chloromethylation reaction to prepare a chloromethylated ordered mesoporous phenolic resin, the reaction temperature of which is 25°C.

[0049] b. Phosphine ligand functionalization of ordered mesoporous phenolic resin

[0050] Dissolve 62 grams of bis(4-methoxy)phenylphosphine chloride in 89 grams of anhydrous tetrahydrofuran, add 2 grams of lithium and stir for 3 hours, and add the resulting solution to the chloromethylated ordered mesopores prepared above 32 grams of phenolic resin, continued to react for 12 hours to prepare ordered mesoporous phenolic resin functionalized with phosphine ligands.

[0051] c. Preparation of supported gold catalyst

[0052] Di...

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Abstract

The invention discloses a supported gold catalyst, its preparation and its application. The invention is characterized in that the catalyst employs a phosphine ligand for complexation of a monovalent gold compound, then monovalent gold compound is supported on an ordered meso pore phenolic resins material, and then the supported gold catalyst with supporting amount of 2.4-4.0wt% is prepared. The preparation of the supported gold catalyst comprises the steps of ordered meso pore phenolic resins chloromethylation and phosphine ligand; the supported gold catalyst has strong catalytic activity for being used in an intramolecular cyclisation reaction and an intermolecular allyl alcohol amination reaction of 2-alkynyl-1,3-dicarbonyls compounds, which is equivalent to the result of a homogeneous reaction. Compared with the prior art, the preparation method has the advantages of simple process, moderate reaction condition, good activity maintenance and little precious metals consumption, the cycle utilization of the catalyst is realized, the environmental pollution is reduced, and the invention provides the effective solution approach for existed problems of the intramolecular cyclisation reaction and the allyl alcohol amination reaction by traditional homogeneous gold catalysis.

Description

technical field [0001] The invention relates to the technical field of chemical catalytic materials and chemical applications, in particular to a supported gold catalyst for the amination reaction of allyl alcohol and its preparation and application. Background technique [0002] Human beings have discovered and utilized gold for a long time, but because of its good chemical stability, its catalytic performance has been neglected for a long time. Since the late 1980s, the catalytic effect of gold has received widespread attention. Gold-catalyzed addition reactions play an important role in organic synthetic chemistry due to their mild reaction conditions and high product yields. Ionic Au(I) complexes with phosphine as ligands have excellent performance in catalytic activation of alkynes and allyl compounds in nucleophilic addition reactions, so that carbon-carbon bonds, carbon-nitrogen bonds construction, etc. ( Angew. Chem . Int. Ed . 2006, 45 , 7896-7936) have gained in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24C07C311/16C07C303/40C07C211/52C07C209/18C07C311/20C07C69/757C07C67/333
CPCY02P20/584
Inventor 吴海虹王泳吴鹏
Owner EAST CHINA NORMAL UNIV
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