The arene-supported cationic nickel allylcomplexes serve as good catalysts for olefinhydrosilylation at room temperature. Detailed mechanistic studies based on experiments and DFT calculations support the novel mechanism, which...
Lewis Base Catalyzed Selective Chlorination of Monosilanes
作者:Alexander G. Sturm、Julia I. Schweizer、Lioba Meyer、Tobias Santowski、Norbert Auner、Max C. Holthausen
DOI:10.1002/chem.201803921
日期:2018.12.3
A preparatively facile, highly selective synthesis of bifunctional monosilanes R2SiHCl, RSiHCl2 and RSiH2Cl is reported. By chlorination of R2SiH2 and RSiH3 with concentrated HCl/ether solutions, the stepwise introduction of Si−Cl bonds is readily controlled by temperature and reaction time for a broad range of substrates. In a combined experimental and computational study, we establish a new mode
[EN] PROCESS FOR THE STEPWISE SYNTHESIS OF SILAHYDROCARBONS<br/>[FR] PROCÉDÉ DE SYNTHÈSE SÉQUENTIELLE DE SILAHYDROCARBURES
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2021243137A1
公开(公告)日:2021-12-02
The invention relates to a process for the stepwise synthesis of silahydrocarbons bearing up to four different organyl substituents at the silicon atom, wherein the process includes at least one step a) of producing a bifunctional hydridochlorosilane by a redistribution reaction, selective chlorination of hydridosilanes with an ether/HCI reagent, or by selective chlorination of hydridosilanes with SiCI4, at least one step b) of submitting a bifunctional hydridochloromonosilane to a hydrosilylation reaction, at least one step c) of hydrogenation of a chloromonosilane, and a step d) in which a silahydrocarbon compound is obtained in a hydrosilylation reaction.
本发明涉及一种逐步合成在硅原子上带有最多四种不同有机基团取代的硅氢化物的过程,其中该过程包括至少以下步骤:a) 通过重分配反应、使用醚/HCI试剂对氢硅烷进行选择性氯化,或者通过使用四氯化硅对氢硅烷进行选择性氯化来制备双功能氢氯硅烷;至少一个步骤 b) 将双功能氢氯单硅烷进行氢硅化反应;至少一个步骤 c) 对氯代单硅烷进行氢化;以及步骤 d) 在氢硅化反应中获得硅氢化物化合物。
SATURATED AND UNSATURATED SILAHYDROCARBONS VIA IRON AND COBALT PYRIDINE DIIMINE CATALYZED OLEFIN SILYLATION
申请人:Lewis Kenrick Martin
公开号:US20140330036A1
公开(公告)日:2014-11-06
The present invention relates to processes for the synthesis of saturated and unsaturated silahydrocarbons using iron-containing or cobalt-containing catalysts. The processes of the invention can produce tetraalkylsilanes, phenyltrialkylsilanes, substituted phenyltrialkylsilanes and their mixtures, which are useful as lubricants and hydraulic fluids, as well as alkyl alkenylsilanes, phenyl alkenylsilanes and substituted phenyl alkenylsilanes and their mixtures, which are useful in the synthesis of saturated silahydrocarbons and other organofunctional silanes.
Calcium-Catalyzed Dehydrogenative Silylation of Aromatic Ethers with Hydrosilane
作者:Lanxiao Zhao、Xianghui Shi、Jianhua Cheng
DOI:10.1021/acscatal.0c05440
日期:2021.2.19
The catalytic regioselective C–H silylation of a wide range of alkoxy-substituted benzene derivatives with primary hydrosilane was achieved by the use of scorpionate-supported calcium benzyl complex [(TpAd,iPr)Ca(p-CH2C6H4Me)(THP)] (1) (TpAd,iPr = hydrotris(3-adamantyl-5-isopropylpyrazolyl)borate, THP = tetrahydropyran) as the precatalyst. This protocol offers an atom-efficient and straightforward
广泛的烷氧基取代的苯衍生物与伯氢硅烷的催化区域选择性C–H甲硅烷基化是通过使用蝎子酸酯负载的苄基钙钙络合物[(Tp Ad,i Pr)Ca(p -CH 2 C 6 H 4 Me)(THP)](1)(Tp Ad,i Pr =氢三(3-金刚烷基-5-异丙基吡唑基)硼酸酯,THP =四氢吡喃)作前催化剂。该方案提供了一种原子高效且直接的方法,用于合成多种不具有氢受体且不含过渡金属的甲硅烷基取代的芳族醚衍生物。茴香酸钙络合物[(TP Ad,iPr)Ca(o -MeO- m- Br-C 6 H 3)](5)和[(Tp Ad,i Pr)Ca(o -Me-OCH 2 C 6 H 4)](6)建议分离出催化反应中间体并进行结构表征。