Pyrimidine-ring-contained palladium metal ligand and preparation method thereof

Abstract

The invention relates to a pyrimidine-ring-contained palladium metal ligand and a preparation method thereof, belonging to the field of organic synthesis. The pyrimidine-ring-contained palladium metal ligand has a general formula which is shown in the specification, wherein the dotted portion is R; R is aryl or ferrocenyl, R1 is phenyl, ring ethyl, ethyl, propyl, or butyl, and Aryl is aryl or heterocyclic group, and X is selected from Cl-, Br- and I-. The preparation method of the pyrimidine-ring-contained palladium metal ligand comprises the following steps of: mixing halogenated pyrimidine ground ring single palladium adduct, Aryl-B(OH)2, alkali and organic solvent; heating and refluxing under the protection of inert gases; adding water after refluence; and then, adding an organic solvent to extract products to obtain a pyrimidine-ring-contained palladium metal ligand. The halogenated pyrimidine ground ring single palladium adduct has a general formula which is shown in the specification, wherein the dotted portion is R; the X1 is Cl-, Br- or I-. The method avoids the direct reaction between a multidentate ligand and a palladium source, avoids adding an additional palladium catalyst in a reaction process, has low requirements for reaction conditions, high yield and stable products and can be used for preparing ring-palladium polynuclear metal compositions.

Description

technical field The invention belongs to the field of organic synthesis, and in particular relates to a class of pyrimidinyl-containing ring palladium metal ligands, and also relates to a preparation method of the compounds. Background technique In recent years, heteropolynuclear metal complexes have outstanding performance in the fields of magnetic exchange of metal ions, electron transfer, bioinorganic chemistry, etc., and have developed into a hot research field, especially in the research of new high-efficiency catalysts and special materials. application. At present, the synthesis methods of heteropolynuclear metal complexes mainly include the following: (1) polymerization of mononuclear complexes; (2) synthesis of complexes as ligands; (3) synthesis by multidentate ligands; (4) Directly synthesized by polyatomic bridging groups; (5) synthesized by substitution reaction of metal ions; (6) spontaneously self-assembled. Among them, the method of "using complexes as liga...

AI Technical Summary

Problems solved by technology

However, multi-dentate ligands have many coordination sites and strong coordination ability, and it is easy to generate palladium complexes instead of the required cyclopalladium compounds when directly reacting with palladium sources.

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