Manganese (II) metal catalyst for benzaldehyde derivative silylation reaction as well as preparation method and application of manganese (II) metal catalyst

The invention relates to the technical field of catalysis, and discloses a manganese (II) metal catalyst for a benzaldehyde derivative silylation reaction as well as a preparation method and application of the manganese (II) metal catalyst. The heterogeneous manganese (II) metal polymer catalyst is prepared under mild conditions, can realize high-efficiency catalysis of a silicon cyanation reaction, and is applied to catalysis of a benzaldehyde derivative reaction. The prepared catalyst is good in stability, the raw materials of the catalyst product are simple and easy to obtain, conditions required by experimental reaction are simple, the yield is high, and the effect of recycling the catalyst is basically unchanged. In the absence of a catalyst or when only a polycarboxyl compound and a metal salt exist, the conversion rate of the silicon cyanation reaction of the benzaldehyde derivative is 5-9%, which indicates that the reaction hardly occurs; when the manganese (II) metal polymer catalyst is used as the c