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Four-chain amido anilino group ligand, aluminium compound of ligand, preparation method of ligand and application of ligand

A tetradentate aminoaniline and aminoaniline technology, which is applied in the field of tetradentate ligands and catalysts for ring-opening polymerization of two lactones, can solve problems such as wide molecular weight distribution, low catalytic activity, and uncontrollable molecular weight of polymers. Achieve the effects of various structural changes, high catalytic activity and high yield

Inactive Publication Date: 2013-02-13
UNIV OF JINAN
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  • Abstract
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  • 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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  • Four-chain amido anilino group ligand, aluminium compound of ligand, preparation method of ligand and application of ligand
  • Four-chain amido anilino group ligand, aluminium compound of ligand, preparation method of ligand and application of ligand
  • Four-chain amido anilino group ligand, aluminium compound of ligand, preparation method of ligand and application of ligand

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Take N, N-dimethylaminobenzaldehyde (8.8 g, 59 mmol) and dissolve it in 30 ml of hexane, slowly add ethylenediamine (1.8 g, 29.5 mmol) dropwise, after the dropwise addition, the reaction is heated under reflux and stirred 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 (5.0 g, 15.5 mmol) of Example 1 and dissolve it in 30 ml of dry diethyl ether, slowly add lithium aluminum hydride (0.6 g, 15.5 mmol) in small amounts at 0 °C, and add The reaction was then slowly raised to room temperature and stirred for 12 hours. After the reaction, slowly add 1.5 mL of ice water to the reaction system to stop the reaction, then add 1.5 mL of NaOH (3M) aqueous solution, 4.5 mL of water, filter, wash the filter cake with 30 ml of ethyl acetate, collect the filtrate, and remove the solvent in vacuo to obtain light yellow liquid A 5.3 g, 96% yield.

Embodiment 3

[0054] Dissolve N,N-diethylaminobenzaldehyde (7.1 g, 40 mmol) in 40 ml of ethanol, slowly add ethylenediamine (0.8 g, 13.3 mmol) dropwise, and heat the reaction to 50°C after the dropwise addition , stirred for 24 hours. After the reaction, 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 four-chain amido anilino group ligand, an aluminium compound of the ligand, a preparation method of the ligand and application of the ligand. A constitutional formula of the ligand is shown in a formula A, and an R1 in the formula is alkyl groups of C1-C4 linear chains or branch chain structures. The ligand and the aluminium compound are simple in synthesis, high in product yield and stable in property, simultaneously a catalyst is high in activity, molecular weight of a polymer can be controlled through control of polymerization reaction conditions, selectivity is wide, and market needs 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 Applications(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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