4206-75-1Relevant academic research and scientific papers
Borohydride catalyzed redistribution reaction of hydrosilane and chlorosilane: A potential system for facile preparation of hydrochlorosilanes
Ai, Liqing,Chen, Yi,Li, Yongming,Xu, Caihong
, p. 17404 - 17407 (2020/06/19)
Various borohydrides were found to catalyze the redistribution reaction of hydrosilane and chlorosilane in different solvents to produce hydrochlorosilanes efficiently and facilely. The redistribution reaction was affected by solvent and catalyst. The substrate scope was investigated in HMPA with LiBH4 as catalyst. A possible mechanism was proposed to explain the redistribution process.
Facile preparation of hydrochlorosilane by alkali metal halide catalyzed Si-H/Si-Cl redistribution reaction
Chen, Yi,Li, Yongming,Xu, Caihong
supporting information, (2020/09/21)
Various alkali metal halides were found to catalyze the Si-H/Si-Cl redistribution reaction in different polar solvents efficiently. The scope of silane substrate was studied using KF as catalyst and 18-crown-6 as cocatalyst in DMI. The alkali metal halides catalyzed redistribution system provides a useful method to prepare hydrochlorosilanes more facilely. A possible mechanism was proposed to explain the process.
Neutral-Eosin-Y-Photocatalyzed Silane Chlorination Using Dichloromethane
Fan, Xuanzi,Xiao, Pin,Jiao, Zeqing,Yang, Tingting,Dai, Xiaojuan,Xu, Wengang,Tan, Jin Da,Cui, Ganglong,Su, Hongmei,Fang, Weihai,Wu, Jie
supporting information, p. 12580 - 12584 (2019/08/16)
Chlorosilanes are versatile reagents in organic synthesis and material science. A mild pathway is now reported for the quantitative conversion of hydrosilanes to silyl chlorides under visible-light irradiation using neutral eosin Y as a hydrogen-atom-transfer photocatalyst and dichloromethane as a chlorinating agent. Stepwise chlorination of di- and trihydrosilanes was achieved in a highly selective fashion assisted by continuous-flow micro-tubing reactors. The ability to access silyl radicals using photocatalytic Si?H activation promoted by eosin Y offers new perspectives for the synthesis of valuable silicon reagents in a convenient and green manner.
Preparation method of phenyl chlorosilane
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Paragraph 0053; 0054, (2019/07/04)
The invention discloses a preparation method of phenyl chlorosilane. The preparation method comprises the following steps: (1) adding silicon powder, a copper catalyst and a sodium-containing compoundinto a reactor; (2) introducing a silicon-copper contact body modifier to pre-treat a silicon-copper contact body at a temperature of 300-500 DEG C; (3) mixing the pretreated silicon-copper contact body with a Cu-CuO-Cu2O-CuCl quaternary copper powder catalyst, and adding the mixture into the reactor; and (4) introducing chlorobenzene, controlling the reaction temperature to be 400-700 DEG C, andcarrying out a reaction to prepare phenyl chlorosilane monomers. According to the method, the use amount of the copper catalyst is low, the conversion rate of chlorobenzene is high, selectivity of phenyl chlorosilane is good, and the yield of diphenyl dichlorosilane with relatively high economic value is high in the product, so that economical efficiency of the phenyl chlorosilane prepared by thedirect method is improved.
Hydrodehalogenation of alkyl halides catalyzed by a trichloroniobium complex with a redox active α-diimine ligand
Nishiyama, Haruka,Hosoya, Hiromu,Parker, Bernard F.,Arnold, John,Tsurugi, Hayato,Mashima, Kazushi
supporting information, p. 7247 - 7250 (2019/07/02)
A high-valent d0 niobium(v) complex, (α-diimine)NbCl3 (1), bearing a dianionic redox-active α-diimine ligand served as a catalyst for a hydrodehalogenation reaction of alkyl halides in the presence of PhSiH3. During the catalytic reaction, the redox-active α-diimine ligand allowed the complex to reversibly release and accept one-electron through switching its coordination mode between a dianionic folded form and a monoanionic planar one.
SYNTHESIS OF ORGANO CHLOROSILANES FROM ORGANOSILANES
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, (2019/04/16)
The invention relates to a process for the production of chlorosilanes by subjecting one or more hydndosilanes to the reaction with hydrogen chloride in the presence of at least one ether compound, and a process for the production of such hydndosilanes serving as starting materials.
Lewis Base Catalyzed Selective Chlorination of Monosilanes
Sturm, Alexander G.,Schweizer, Julia I.,Meyer, Lioba,Santowski, Tobias,Auner, Norbert,Holthausen, Max C.
supporting information, p. 17796 - 17801 (2018/11/23)
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 of Si?H bond activation assisted by Lewis bases such as ethers, amines, phosphines, and chloride ions. Elucidation of the underlying reaction mechanisms shows that alcohol assistance through hydrogen-bond networks is equally efficient and selective. Remarkably, formation of alkoxysilanes or siloxanes is not observed under moderate reaction conditions.
B(C6F5)3-Catalyzed Selective Chlorination of Hydrosilanes
Chulsky, Karina,Dobrovetsky, Roman
supporting information, p. 4744 - 4748 (2017/04/11)
The chlorination of Si?H bonds often requires stoichiometric amounts of metal salts in conjunction with hazardous reagents, such as tin chlorides, Cl2, and CCl4. The catalytic chlorination of silanes often involves the use of expensive transition-metal catalysts. By a new simple, selective, and highly efficient catalytic metal-free method for the chlorination of Si?H bonds, mono-, di-, and trihydrosilanes were selectively chlorinated in the presence of a catalytic amount of B(C6F5)3 or Et2O?B(C6F5)3 and HCl with the release of H2 as a by-product. The hydrides in di- and trihydrosilanes could be selectively chlorinated by HCl in a stepwise manner when Et2O?B(C6F5)3 was used as the catalyst. A mechanism is proposed for these catalytic chlorination reactions on the basis of competition experiments and density functional theory (DFT) calculations.
By the hydrogen-containing silane-efficient and controllable synthetic chlorosilane method (by machine translation)
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Paragraph 0037; 0038, (2017/12/02)
The invention relates to a method of synthesizing chlorosilane from hydrogen-containing silane. The method comprises the step of enabling the hydrogen-containing silane to react with copper chloride in the presence of inert material particles. Dosage of a solvent is greatly lowered (only 0-150 ml of solvent is needed for synthesizing every 0.1 mol of chlorosilane), and even the solvent can be not used, and the reaction can be carried out as long as liquid silane can completely soak solid materials. Reaction time is greatly shortened and side reactions are less. Meanwhile, conversation rate of the reaction is greatly improved, and yield of a purified product is higher.
Base-Metal-Catalyzed Regiodivergent Alkene Hydrosilylations
Du, Xiaoyong,Zhang, Yanlu,Peng, Dongjie,Huang, Zheng
supporting information, p. 6671 - 6675 (2016/06/08)
A complementary set of base metal catalysts has been developed for regiodivergent alkene hydrosilylations: iron complexes of phosphine-iminopyridine are selective for anti-Markovnikov hydrosilylations (linear/branched up to >99:1), while the cobalt complexes bearing the same type of ligands provide an unprecedented high level of Markovnikov selectivity (branched/linear up to >99:1). Both systems exhibit high efficiency and wide functional group tolerance. Regiodivergent alkene hydrosilylation has been accomplished with high efficiency using a newly developed set of complementary base metal catalyst systems. An inversion of regioselectivity (linear/branched) from >99:1 to 1:99 is obtained when the iron version of the catalyst is exchanged for a cobalt-containing analogue.
