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Multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex and preparation method and application thereof

A polydentate nitroxide tertiary amine and nitroxide tertiary amine technology, which is applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, and organic compounds of Group 3/13 without C-metal bonds, etc., It can solve the problem that the catalytic performance of the lactide ring-opening polymerization catalyst needs to be improved, and achieve good activity and stereoselectivity, and improve the catalytic performance.

Inactive Publication Date: 2018-04-24
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the catalytic performance of the existing lactide ring-opening polymerization catalyst needs to be improved, and provide multidentate nitroxide tertiary amine ligands Ga, In complexes and their preparation methods and applications

Method used

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  • Multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex and preparation method and application thereof
  • Multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex and preparation method and application thereof
  • Multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex and preparation method and application thereof

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specific Embodiment approach 1

[0030] Specific implementation mode 1: The chemical structural formula of the polydentate nitroxide tertiary amine ligand Ga, In complex in this implementation mode is:

[0031]

[0032] Wherein M=In or Ga, X=Cl, O i Pr, OEt or O t Bu; R 1 is H, Cl, Br, I, Me, i Pr, tBu or cumyl (cumyl), R 2 is H, Cl, Br, I, Me, i Pr, t Bu or cumyl, R 3 for Cl, Br, t Bu or Me, R 4 for Cl, Br, t Bu or Me.

[0033] In this embodiment, asymmetric nitroxide multidentate ligands are used to synthesize lactide ring-opening polymerization metal gallium and indium complex catalysts, which can prepare polylactide with narrow molecular weight distribution and stereoregularity.

specific Embodiment approach 2

[0034] Specific embodiment two: the preparation method of multidentate nitroxide tertiary amine ligand Ga, In complex in this embodiment is implemented according to the following steps:

[0035] Under nitrogen protection, add organic medium to the schlenk bottle, add NaH (at room temperature) and stir for 0.3-0.6 hours, then add asymmetric N 2 o 2 Ligand, continue to stir for 3 to 6 hours, cool down to 0°C, and then add anhydrous GaCl 3 or InCl 3 , stirred at room temperature for 10 to 14 hours, and the filtrate after pressure filtration was precipitated at a temperature of -18 to -22°C to obtain a multidentate nitrogen oxide tertiary amine ligand Ga, In complex;

[0036] where the asymmetric N 2 o 2 The structural formula of the ligand is L A or L B , L A for L B for R in the structural formula 1 is H, Cl, Br, I, Me, i Pr, t Bu or cumyl (cumyl), R 2 is H, Cl, Br, I, Me, i Pr, t Bu or cumyl, R 3 for Cl, Br, t Bu or Me, R 4 for Cl, Br, t Bu or Me.

[0037...

specific Embodiment approach 3

[0038] Specific embodiment three: the difference between this embodiment and specific embodiment two is that NaH and asymmetric N 2 o 2 The molar ratio of ligands is 1:2-1:4. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention relates to multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex and a preparation method and application thereof and is intended to solve the problem that catalytic performance of existing lactide ring-opening polymerization catalyst needs to be improved. The multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex has a chemical structural formula shown in the description. The multidentate nitrogen-oxygen tertiary amine ligand Ga-In complex is applicable to the preparation of polylactide. By adjusting ligand structure and introducing different substituents tomodulate spatial structure and electron arrangement of the complex, the catalytic performance of the complex is improved, good activity and stereo-selectivity are imparted in lactide ring opening polymerization, and finished polylactide with high stereo tacticity is prepared.

Description

technical field [0001] The invention relates to a Ga, In metal complex containing multi-dentate nitroxide tertiary amine ligands and a synthesis method thereof, as well as the application of the complex in ring-opening polymerization of lactide. Background technique [0002] Polymer materials still play an important role in the future development of the national economy. As far as the currently used polymer materials are concerned, most of them come from petroleum. However, as a non-renewable resource, petroleum will be increasingly tight in supply. In addition, Polymer materials that use petroleum as raw materials are often difficult to degrade and easily cause environmental pollution after being discarded. Therefore, the development of new environmentally friendly polymer materials derived from renewable resources is a development trend in this field. Among them, environmentally friendly and biocompatible polylactide has attracted much attention. Polylactide, whose raw ma...

Claims

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Application Information

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IPC IPC(8): C07F5/00C08G63/84C08G63/08
CPCC07F5/003C08G63/08C08G63/823
Inventor 胡明刚王晓雄王栋
Owner QIQIHAR UNIVERSITY
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