Silicon-based modified isonitrile metal salt catalyst and preparation method and application thereof

Abstract

The invention relates to the field of catalysts, and discloses a silicon-based modified isonitrile metal salt catalyst. The silicon-based modified isonitrile metal salt catalyst has a structure shownin formula (I), wherein R is C1-C6 alkyl groups or C1-C6 alkoxy groups, n is an integer ranging from 1 to 6, and M is divalent metal. The invention further discloses a preparation method of the silicon-based modified isonitrile metal salt catalyst. The preparation method is simple, the reaction conditions are mild, the cost is low, and the substrate universality is wide. The invention further discloses a hydrosilylation reaction catalyzed by applying the catalyst. The catalyst is used for hydrosilylation of olefin, which not only improves the compatibility of the catalyst and a hydrosilylationreaction substrate and improves the catalytic effect, but also can inhibit the generation of by-products in the reaction process and effectively increase the yield of a target product.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a silicon-based modified isocyanide metal salt catalyst and a preparation method and application thereof. Background technique [0002] Olefin-catalyzed hydrosilylation plays an important role in synthetic organic chemistry, and is one of the most important ways to synthesize organosilicon coupling agents and functional organosilicon compounds and polymers (Leslie D. Field, Antony J. Ward, J Organomet. Chem, 2003, 681, 91-97). Previously, Karstedt was usually used as a catalyst for hydrosilylation reaction. Although Karstedt catalyst has high activity as a catalyst for hydrosilylation reaction, the reaction system is unstable, platinum black is easily produced, and the selectivity of the target product is also low. , more reaction by-products (Chisso Corp. JP., 8204995, 1982). [0003] Later, through the study of various transition metal complexes, it was found that transition metal (i...

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Problems solved by technology

But for certain types of hydrosilylation reactions, such as the hydrosilylation of olefins and alkoxysilanes, transition metals (iron, cobalt, etc.) are used as catalysts, and the catalytic activity is not high and the preparation method is complicated (Tondreau AM, et al Science, 2012, 335, 567; Chen C, et al J.Am.Chem.Soc., 2015, 137, 13244)

[0004] Aiming at the problem that the preparation method of the above-mentioned hydrosilylation catalyst is complicated or expensive, the invention patent application document with the publication number CN106831850A discloses a hydrosilylation reaction, specifically using olefins and hydrosilanes as raw materials, under the action of the catalyst Carry out hydrosilylation reaction, described catalyst is selected from the divalent metal salt of a straight-chain aliphatic carboxylic acid whose terminal position is isocyanide group, structural formula is M[CN(CH 2 ) n COO] 2 , where M=Fe, Co, n=3,5,6,10, the catalyst is cheap and easy to prepare, which solves the problem of high cost of the catalyst due to the use of noble metals

[0005] But, the miscibility of above-mentioned catalyzer and reaction substrate is relatively poor, and the yield of part target product is still unsatisfactory

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