40934-68-7Relevant articles and documents
Transition metal-catalyzed hydrosilylation of polybutadiene – The effect of substituents at silicon on efficiency of silylfunctionalization process
Januszewski, Rafa?,Kownacki, Ireneusz,Maciejewski, Hieronim,Marciniec, Bogdan
, p. 27 - 34 (2019)
Herein we present the results of our studies on the hydrosilylation of polybutadiene with alkyl, aryl and alkoxysilanes in the presence of platinum and rhodium complexes. In order to select the most efficient catalytic system, which, under optimal conditions, would smoothly promote incorporation of the above-mentioned organosilicon modifiers into polybutadienes of various structures via hydrosilylation, the real-time in-situ FT-IR spectroscopy was used. The silyl-functionalized polymeric products were characterized by NMR analysis and gel permeation chromatography (GPC). It was demonstrated that the stereo-electronic properties of substituents directly bonded to the HSi moiety play a crucial role in formation of desired products, as well as affect the time required for total conversion of organosilicon reagents. Partially modified polymers containing pendant alkoxy groups can be applied as additives to rubber compounds to enhance dispersion of inorganic particles in the polymer matrix, as well as to promote formation of organic-inorganic hybrid materials.
PROCESS FOR FUNCTIONALIZATION OF ORGANO-METAL COMPOUNDS WITH SILYL-BASED FUNCTIONALIZATION AGENTS AND SILYL-FUNCTIONALIZED COMPOUNDS PREPARED THEREBY
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Paragraph 0070; 0072, (2019/10/15)
A process to functionalized organo-metal compounds with silyl-based electrophiles. The process includes combining an organo-metal compound, a silyl-based functionalization agent, and an optional solvent. Functionalized silanes and silyl-terminated polyolefins can be prepared by this process.
Synthesis of hydrosilanes: Via Lewis-base-catalysed reduction of alkoxy silanes with NaBH4
Aoyagi, Keiya,Ohmori, Yu,Inomata, Koya,Matsumoto, Kazuhiro,Shimada, Shigeru,Sato, Kazuhiko,Nakajima, Yumiko
supporting information, p. 5859 - 5862 (2019/05/27)
Hydrosilanes were synthesized by reduction of alkoxy silanes with BH3 in the presence of hexamethylphosphoric triamide (HMPA) as a Lewis-base catalyst. The reaction was also achieved using an inexpensive and easily handled hydride source NaBH4, which reacted with EtBr as a sacrificial reagent to form BH3in situ.