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Tetradentate aminoanilino ligand, aluminum compound of ligand, preparation method and application thereof

An aminoaniline and compound technology, applied in the field of tetradentate ligands and catalysts for ring-opening polymerization of two lactones, can solve the problems of uncontrollable polymer molecular weight, low catalytic activity, wide molecular weight distribution, etc., and achieve diverse structural changes. , The effect of high catalytic activity and less metal residue

Inactive Publication Date: 2016-01-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymerization reaction requires a special selective catalyst to make the monomer polymerize according to the structure and molecular weight we need. Although stannous octoate can catalyze the ring-opening polymerization of lactide, its catalytic activity is too low and the molecular weight of the obtained polymer is uncontrollable. Wide molecular weight distribution

Method used

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  • Tetradentate aminoanilino ligand, aluminum compound of ligand, preparation method and application thereof
  • Tetradentate aminoanilino ligand, aluminum compound of ligand, preparation method and application thereof
  • Tetradentate aminoanilino ligand, aluminum compound of ligand, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take N, N-dimethylaminobenzaldehyde (8.8g, 59mmol) and dissolve it in 30ml of hexane, slowly add ethylenediamine (1.8g, 29.5mmol) dropwise, after the dropwise addition, the reaction is heated under reflux and stirred for 12 hours . After cooling and crystallization, 7.2 g of yellow powder Schiff's base was obtained by filtration, with a yield of 76%.

Embodiment 2

[0052] in N 2 Under the atmosphere, take the Schiff base (5.0g, 15.5mmol) of Example 1 and dissolve it in 30ml of dry diethyl ether, and slowly add lithium aluminum hydride (0.6g, 15.5mmol) in small amounts at 0°C. The reaction was slowly warmed to room temperature and stirred for 12 hours. After the reaction, slowly add 1.5mL of ice water to the reaction system to stop the reaction, then add 1.5mL of NaOH (3M) aqueous solution, 4.5mL of water, filter, wash the filter cake with 30ml of ethyl acetate, collect the filtrate, remove the solvent in vacuo to obtain a light yellow liquid A 5.3 g, yield 96%.

Embodiment 3

[0054] Take N,N-diethylaminobenzaldehyde (7.1g, 40mmol) and dissolve it in 40ml of ethanol, slowly add ethylenediamine (0.8g, 13.3mmol) dropwise, after the dropwise addition, the reaction is heated to 50°C and stirred 24 hours. After the reaction was completed, the solution was concentrated, 10 mL of hexane was added to cool and crystallize, and 3.6 g of yellow powder Schiff base was obtained by filtration, with a yield of 71%.

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Abstract

The invention discloses a tetradentate aminoanilino ligand, an aluminum compound of the ligand, their preparation method and application. The structural formula of the ligand is shown in the following formula A, where R1 is a C1-C4 straight chain Or an alkyl group with a branched chain structure. The ligand and the aluminum compound of the present invention are simple to synthesize, high in product yield, stable in properties and high in catalyst activity. By controlling the conditions of the polymerization reaction, the molecular weight of the polymer can be regulated, the selectivity is wide, and the needs of the market can be met.

Description

technical field [0001] The present invention relates to a tetradentate ligand and two catalysts for ring-opening polymerization of lactones, in particular, to a tetradentate aminoanilino ligand and two aluminum compound catalysts of the ligand, and their Preparation methods and applications. Background technique [0002] Polyolefin, which uses petroleum as raw material, has excellent performance and price advantages, but it is difficult to decompose after use, which has caused the relatively serious "white pollution" problem at present. Petroleum resources are non-renewable, and a large amount of unreasonable use has brought serious resource shortage problems to human beings. The emergence of degradable materials, especially the emergence of degradable materials using renewable resources as raw materials, provides an effective means to solve this problem. [0003] So far, the most studied biodegradable materials with better performance are aliphatic polyesters (such as pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/49C07C209/52C07F5/06C08G63/08C08G63/84
Inventor 姚伟高爱红薛颖朝刘甜甜高洪远张巧娜李浩生王岩王增龙崔宁
Owner UNIV OF JINAN
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