2602-34-8Relevant articles and documents
Preparation method of epoxy silane coupling agent
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Paragraph 0078-0079, (2021/05/05)
The invention provides a preparation method of an epoxy silane coupling agent. The preparation method comprises the following steps: (1) synthesizing diallyl ether from chloropropene and allyl alcohol under the action of a catalyst and an alkali; (2) carrying out a hydrosilylation reaction on the diallyl ether and hydrogen-containing chlorosilane under the action of a platinum catalyst to obtain allyloxopropyl chlorosilane; (3) carrying out esterification reaction on the allyloxopropyl chlorosilane and saturated alcohol to obtain allyloxoalkoxy silane; and (4) carrying out epoxidation on the allyloxyalkoxy silane by using an oxidizing agent, so as to obtain gamma-(2, 3-epoxypropoxypropyl)alkoxy silane. The preparation method provided by the invention can be suitable for all gamma-(2, 3-epoxypropoxypropyl) epoxy silane, the used catalyst and raw materials are easy to obtain, the yield is high, and the industrial feasibility is high.
Platinum(II) complexes bearing bulky Schiff base ligands anchored onto mesoporous SBA-15 supports as efficient catalysts for hydrosilylation
Huo, Yingpeng,Hu, Jiwen,Lin, Shudong,Ju, Xingming,Wei, Yanlong,Huang, Zhenzhu,Hu, Yangfei,Tu, Yuanyuan
, (2019/04/26)
Reported herein is an easy-to-prepare novel heterogeneous catalyst of platinum complexes bearing binary ligands of bidentate naphthalenolimine and cyclo-1,5-octadiene that are anchored onto mesoporous silica SBA-15. The presence of the binary ligands not only stabilized the platinum, but also enabled the platinum atoms to form nanoclusters with diameters of ca 1?nm, and led to high platinum loading (8.69?wt%). Moreover, the platinum catalyst exhibited high catalytic activity towards hydrosilylation of terminal alkenes and styrene with silanes under mild and solvent-free conditions, with excellent regioselectivity.
Nano-dispersed platinum(0) in organically modified silicate matrices as sustainable catalysts for a regioselective hydrosilylation of alkenes and alkynes
Duke, Brett J.,Akeroyd, Evan N.,Bhatt, Shreeja V.,Onyeagusi, Chibueze I.,Bhatt, Shreya V.,Adolph, Brandy R.,Fotie, Jean
, p. 11782 - 11795 (2018/07/25)
Nano-dispersed platinum(0) particles stabilized in a range of organically modified silicate (ORMOSIL) matrices are investigated as sustainable catalysts for the hydrosilylation of alkenes and alkynes. In this study, five different siloxane matrices including triethoxysilane (HTEOS), methyltriethoxysilane (MTES), ethyltriethoxysilane (ETES), triethoxyvinylsilane (TEVS) and propyltriethoxysilane (PTES) are investigated, and the distribution of the metal particles in these materials analyzed by transition electron microscopy (TEM). The particles appeared to be generally of a small size, with a diameter of ca. 2-5 nm in each of these catalysts, however the distribution is not equally uniform from one matrix to the other. HTEOS, MTES and ETES that respectively carry a hydrogen, a methyl and an ethyl group on the triethoxysilane moiety, displayed a more uniform distribution, while particles appeared to be more scattered in the remaining matrices. Catalysts with a uniform particles distribution produced higher and consistent yields, while those with poor particles distribution produced lower and almost random yields, suggesting that the uniformity in particle distribution, and by extension the nature of the siloxane matrix, are important for the catalytic properties of these materials. The scope of the reaction was broadened to a range of olefins, with a goal of investigating the tolerability of the reaction toward a number of reactive functional groups, resulting in the preparation of 28 compounds. This catalytic system also enabled the hydrosilylation of a limited number of alkynes under the optimized reaction conditions.
