Preparation of silica gel supported metalloporphyrin compound and application method thereof

Abstract

The invention belongs to the technical field of supported metalloporphyrins, and in particular relates to preparation of a silica gel supported metalloporphyrin compound and an application method thereof so as to solve the problems of preparing the metalloporphyrin compound in the prior art. The preparation steps are that: tetraphenylporphyrin, Lewis acid and trichloromethane are added with a chloromethylation reagent dropwise for thermostatic reaction, and chloromethylation tetraphenylporphyrin is obtained after treatment; the chloromethylation tetraphenylporphyrin is dissolved into DMF, themixture is added with silica gel for temperature reaction, and the silica gel supported porphyrin is obtained after treatment; and the silica gel supported porphyrin is dissolved into the DMF, the mixture is subjected to temperature rise and added with metal salt or oxide for reaction, and the silica gel supported metalloporphyrin compound is obtained after treatment. The application method comprises that: phenylethane and the silica gel supported metalloporphyrin compound are introduced with O2 for the temperature reaction, and a main product hypnone is obtained after treatment. The inventionhas the advantages that: the reaction is easier, and the supported degree of the porphyrin is high; and in the application, the activity of a catalyst is effectively protected, the activities of thecatalyst are promoted, and the yield and the selectivity of the main product are improved.

Description

A kind of preparation and application method of silica gel immobilized metal porphyrin compound technical field The invention belongs to the technical field of immobilized metalloporphyrins, and in particular relates to the preparation and application method of a silica gel-immobilized metalloporphyrin compound. Background technique Metalloporphyrins (MPs) are an important class of biomimetic catalysts, which can imitate biological oxidases and realize the catalytic activation of molecular oxygen under mild conditions, so that hydrocarbons can be synthesized efficiently, selectively, and environmentally friendly. Oxidation. However, expensive MPs catalysts have two outstanding disadvantages, which limit their application in organic synthesis: (1) difficult to separate and not easy to recycle; (2) lack of stability in catalytic performance, easy to be oxidized and lost live. An important way to overcome the above problems is to immobilize metalloporphyrins, such as using ...

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Problems solved by technology

The method utilizes metalloporphyrin as a catalyst, and the selectivity is poor, the yield of acetophenone is low, and industrialization is difficult; in addition, the catalyst cannot be reused, and the catalytic performance lacks stability, and is easily oxidized and deactivated by itself.

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