Preparation method of methyl aluminum complex of tetradentate nitrogen and oxygen ligand

The invention discloses a preparation method of a methyl aluminum complex of a tetradentate nitrogen and oxygen ligand. The preparation method comprises the following steps: reacting N,N'-dimethyl-N,N'-diphenyl ethylenediamine and benzaldehyde or substituted benzaldehyde under the existenc...

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Hauptverfasser:	YAO WEI, DOU TONGWEN, GAO AIHONG, XUE CHUNKE, SUN JINGHUI, JIANG GUOMIN, QU HUAMING, XU ZHENGHE
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention discloses a preparation method of a methyl aluminum complex of a tetradentate nitrogen and oxygen ligand. The preparation method comprises the following steps: reacting N,N'-dimethyl-N,N'-diphenyl ethylenediamine and benzaldehyde or substituted benzaldehyde under the existence of n-butyllithium to obtain the tetradentate nitrogen and oxygen ligand; adding trimethylaluminum with the molar weight equal to that of the ligand into the ligand at below 20-0 DEG C, heating up to be at room temperature, then heating up to be at 80 DEG C and reacting for 12h, and treating to obtain aluminum complex after reaction, wherein the structural formula of the complex is shown in the formula I. The preparation method is simple and easy to implement, the obtained ligand has good performance, and can be reacted with the aluminum alkyl to generate the aluminum complex, and the methyl aluminum complex can catalyze ring-opening polymerization of lactide efficiently, has high catalyst activity, can regulate the stereochemical structure and the molecular weight of the polymer, can meet different requirements and has good market prospect.