Preparation and application of novel isopropyl zirconocene complex

Abstract

The invention provides a novel metallocene catalyst and a green catalytic synthesis method of a polyarylate substituted 1,3-dicarbonyl compound developed by the catalyst. Zirconium atoms in the metallocene catalyst are connected with each other through two isopropyl-substituted cyclopentadienyl rings to display tetravalence; the zirconium atoms are coordinated with three hydrones; and the overall organic zirconium cationic part and the corresponding anions form an ion bond. The green synthesis method comprises the following steps: with a 1,3-dicarbonyl compound with active hydrogen as a reaction raw material, and aryl alcohol as an alkylation agent, carrying out intramolecular dehydration alkylation reaction under catalysis of perfluorooctane sulfonate isopropyl cyclopentadienyl zirconium; and obtaining a series of multiaryl-substituted 1,3-dicarbonyl compounds at a relatively low temperature and high yield. The method has the main advantages of being mild in reaction condition, simple to test and operate, high in yield and the like; the reaction is suitable for kinds of 1,3-dicarbonyl derivatives and different aryl alcohol; with perfluorooctane sulfonate isopropyl cyclopentadienyl zirconium as a catalyst, the catalyst can be recycled and used for a plurality of times; and meanwhile, the sole by-product is water, and has the advantages of being green, free of pollution and the like.

Description

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AI Technical Summary

Benefits of technology

This patented catalyst works well with different types of chemicals like olefins or phenolic hydroxylic acids while also being able to resist oxidizing agents such as nitrogen dioxide (NO2) from reacting it repeatedly over time without losing its effectiveness. It's easy to use because it doesn’t require any special equipment during production but still produces good yields when compared to other methods that have been previously developed.

Problems solved by technology

This patented technical problem addressed in this patent relates to finding new ways to efficiently make chemical molecules from alkenoieties without generating unwanted side products during their formation process due to excessive amounts of basic substances needed. Existing techniques involve either adding bases like ammonia or other acids to neutralize these residual substratients beforehand, but they may result in reduced yields and environmental concerns if applied over long periods of time.

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