- PROCESS FOR THE STEPWISE SYNTHESIS OF SILAHYDROCARBONS
-
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.
- -
-
Page/Page column 65; 66
(2021/12/08)
-
- SYNTHESIS OF ORGANO CHLOROSILANES FROM ORGANOSILANES
-
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.
- -
-
Page/Page column 50
(2019/04/16)
-
- Silicon-hydrogen addition reaction (by machine translation)
-
The invention relates to the field of organic chemistry, in order to solve the addition reaction catalyst with hydrogen in the presence of the problem, the invention provides a method for addition reaction, in order to olefin and three b oxygen radical hydrogen silicane as raw materials, in order to b [(1 - mPEG - 3 - alkyl 2 - diphenyl [...] halide) rhodium chloride] as the catalyst, heating 50 - 90 °C stirring for 4 - 6 hours, filtration, vacuum distillation fraction of, hydrogen addition product is obtained. This method of mild reaction conditions, security, high reaction conversion rate, β addition product selectivity is strong, it is convenient to separate the products and the catalyst, the catalyst can be recycled. (by machine translation)
- -
-
Paragraph 0064; 0065
(2018/04/21)
-
- Hydrosilylation reaction using recyclable platinum compound as catalyst
-
The present invention relates to the field of organic chemistry. In order to solve the problems existing in catalysts for a hydrosilylation reaction, the present invention provides a hydrosilylation reaction method. The method comprises the steps of using an olefin and triethoxysilane as raw materials and taking bis[(1-mPEG-3-alkyl-2-diphenylphosphinous imidazolium halide)platinum dichloride] as acatalyst, performing heating to 50-90 DEG C, performing a stirring reaction for 4-6 hours, performing filtration, performing vacuum distillation, and collecting fractions to obtain a hydrosilylationproduct. The reaction conditions of the method are mild and safe, the reaction conversion rate is high, the selectivity of a beta addition product is high, separation of the products and the catalystis convenient, and the catalyst can be recovered and reused.
- -
-
Paragraph 0064; 0065
(2018/04/21)
-
- Thermal hydrosilylation of olefin with hydrosilane. Preparative and mechanistic aspects
-
The reaction of trichlorosilane (1a) at 250 °C with cycloalkenes, such as cyclopentene (2a), cyclohexene (2b), cycloheptene (2c), and cyclooctene (2d), gave cycloalkyltrichlorosilanes [CnH2n-1SiCl3: n = 5 (3a), 6 (3b), 7 (3c), 8 (3d)] within 6 h in excellent yields (97-98%), but the similar reactions using methyldichlorosilane (1b) instead of 1a required a longer reaction time of 40 h and afforded cycloalkyl(methyl)dichlorosilanes [CnH2n-1SiMeCl2: n = 5 (3e), 6 (3f), 7 (3g), 8 (3h)] in 88-92% yields with 4-8% recovery of reactant 2. In large (2, 0.29 mol)-scale preparations, the reactions of 2a and 2b with 1a (0.58 mol) under the same condition gave 3a and 3b in 95% and 94% isolated yields, respectively. The relative reactivity of four hydrosilanes [HSiCl3-mMem: m = 0-3] in the reaction with 2a indicates that as the number of chlorine-substituent(s) on the silicon increases the rate of the reaction decreases in the following order: n = 3 > 2 > 1 ? 0. In the reaction with 1a, the relative reactivity of four cycloalkenes (ring size = 5-8) decreases in the following order: 2d > 2a > 2c > 2b. Meanwhile linear alkenes like 1-hexene undergo two reactions of self-isomerization and hydrosilylation with hydrosilane to give a mixture of the three isomers (1-, 2-, and 3-silylated hexanes). In this reaction, the reactivity of the terminal 1-hexene is higher than the internal 2- and 3-hexene. The redistribution of hydrosilane 1 and the polymerization of olefin 2 occurred rarely under the thermal reaction condition.
- Jung, Dong Euy,Han, Joon Soo,Yoo, Bok Ryul
-
experimental part
p. 3687 - 3692
(2011/11/29)
-
- PRODUCTION METHOD FOR LINEAR AND CYCLIC TRISILAALKANE
-
The present invention relates to a preparation method for a linear or cyclic trisilaalkane which is a substance useful in the preparation of polycarbosilane and silicon carbide precursors. Linear or cyclic trisilaalkane and organic trichlorosilane derivatives can be synthesized simultaneously and in high yield by reacting bis(chlorosily)methane having a Si—H bond, either alone or together with an organic chloride, using a quaternary organic phosphonium salt compound as a catalyst. Further, since the catalyst can be recovered after use, the present invention is very economical and is thus effective for mass-producing precursors for organic/inorganic hybrid substances.
- -
-
Page/Page column 5
(2011/04/19)
-
- Reaction of allylamine with hexylsilane
-
The reaction of hexylsilane with allylamine is accompanied by the liberation of hydrogen and formation of allylaminosilanes and compounds with the Si-Si bond. The hydrosilylation pathway virtually is not realized. The B3LYP/6-311G**calculations show that all the considered reactions are thermodynamically allowed. Pleiades Publishing, Inc., 2006.
- Storozhenko,Belyakova,Knyazev,Shutova,Khromykh,Starikova,Chernyshev
-
p. 220 - 224
(2008/02/07)
-
- Trichlorosilyl groups containing organochlorosilanes and their preparation methods by the double-silylation of olefins with trichlorosilane
-
The present invention provides organosilicon compounds containing two trichlorosilyl groups and their preparation methods. Organosilicon compounds of formula II are prepared by reacting linear chain or cyclic olefins of formula I with trichlorosilane in the presence of quaternary organophosphonium salt as a catalyst.R1—HC=CH—R2??(I) 1In formulas I and II, R1 and R2 may be identical or different and represent a hydrogen atom, a linear or a cyclic C1-C8 alkyl, a linear or a cyclic C1-C8 alkenyl, benzyl, phenyl, a C1-C8 alkyl substituted phenyl group, two functional groups between R1 and R2 may be covalently bonded to form a C4-C8 ring with or without a carbon-carbon double bond.
- -
-
-
- Dehydrohalogenative coupling reaction of organic halides with silanes
-
The present invention relates to methods for making the compounds of formula I which is a dehydrohalogenative coupling of hydrochlorosilanes of formula II with organic halides of formula III in the presence of a Lewis base catalyst. R3CH2SiR1Cl2??(I) HSiR1Cl2??(II) R2CH2X??(III) In formulas I and II, R1represents a hydrogen, chloro, or methyl; in formula III, X represents a chloro or bromo; in formula III, R2can be selected from the group consisting of a C1-17alkyl, a C1-10fluorinated alkyl with partial or full fluorination, a C1-5alkenyl groups, a silyl group containing alkyls, (CH2)nSiMe3-mClmwherein n is 0 to 2 and m is 0 to 3, aromatic groups, Ar(R′)1wherein Ar is C6-14aromatic hydrocarbon, R′ is a C1-4alkyl, halogen, alkoxy, or vinyl, and q is 0 to 5, a haloalkyl group, (CH2)pX wherein p is 1 to 9 and X is a chloro or bromo; or an aromatic hydrocarbon, Ar CH2X wherein Ar is C6-14aromatic hydrocarbon and X is a chloro or bromo. in formula I, R3is the same as R2in formula III and further, R3can also be (CH2)pSiR1Cl2or ArCH2SiR1Cl2when R2in formula III is (CH2)pX or ArCH2X, because of the coupling reaction of X with the compound of formula II.
- -
-
-
- Catalytic activity of bis(dialkylamino)carbenium salts in hydrosilylation reactions
-
Bis(dialkylamino)carbenium salts {[(Me2N)2CCl]+}2MCl4 2- (M = Ni, Pd) and {[Me2NC(X)NR2]+}2PtCl62- (R = Me, All; X = H, Cl, Me) are efficient catalysts for hydrosilylation of allyl phenyl ether, triallylamine, allyl chloride, allylamine, and 1-octene with various hydrosilanes. The catalytic activity is dependent on the salt composition and the nature of the metal M, the saturated compound, and the hydrosilane used. The catalysts used are usually insoluble in the reaction mixture, active, and stable. In some cases, carbenium salts are more selective than Speier's catalyst. Novel catalysts, silica-immobilized dialkylaminocarbenium salts, have been prepared. The kinetics of the reaction have been considered.
- Chernyshev,Belyakova,Sheludyakov,Shevchenko
-
p. 1003 - 1006
(2007/10/03)
-
- Asymmetric Hydrosilylation of 1-Alkenes Catalyzed by Palladium-MOP
-
Asymmetric hydrosilylation of simple terminal alkenes (RCH=CH2) with trichlorosilane at 40 deg C in the presence of 1*10-3 or 1*10-4 molar amounts of palladium catalyst prepared in situ from 3-C3H5)>2 and (S)-2-diphenylphosphino-2'-methoxy-1,1'-binaphthyl ((S)-MeO-MOP) proceeded with unusual regioselectivity and with high enantioselectivity to give high yields of 2-(trichlorosilyl)alkanes together with a minor amount of 1-(trichlorosilyl)alkanes.Optically active alcohols, RCH(OH)CH3, were obtained by oxidation of the carbon-silicon bond.Regioselectivities for forming 2-silylalkanes over 1-silylalkanes and enantiomeric purities of alcohols are as follows: R=n-C4H9: 89/11, 94percent ee (R).R=n-C6H13: 93/7, 95percent ee (R).R=n-C10H21: 94/6, 95percentee (R).R=PhCH2CH2: 81/19, 97percentee (S).R=PhCH2CH2CH2: 80/20, 92percent ee (R).R=cyclo-C6H11: 66/34, 96percent ee (R).A similar hydrosilylation of 1-alkenes, 4-pentenyl benzoate and 1,5-heptadiene gave corresponding 2-alkanols of 90percent ee and 87percent ee, respectively, the ester carbonyl and the internal double bond remaining intact.
- Uozumi, Yasuhiro,Kitayama, Kenji,Hayashi, Tamio,Yanagi, Kazunori,Fukuyo, Emiko
-
p. 713 - 722
(2007/10/02)
-
- Polymer supported ferrocene derivatives. Catalytic hydrosilylation of olefins by supported palladium and platinum complexes
-
Platinum and palladium derivatives of polymers functionalized with the ferrocene derivatives 1-ferrocenylethyldimethylamine (3), 1,1'-bis(diphenylphosphino)ferrocene (4), N,N-dimethyl-1-(2-diphenylphosphinoferrocenyl)ethylamine (5), and (S,R)-5 are effective catalysts for the hydrosilylation of olefins such as styrene and 1-hexene by trichlorosilane.They can be recycled with no loss of activity.The palladium derivatives catalyze stereoselective α-addition to styrene and the optical yield using (S,R)-5 is 15.2percent.The stereoselectivity remains the same but the optical yield drops on recycling.All other reactions studied result in addition to the terminal carbon atom of the olefin.The absence of ligand effects indicates that the platinum derivatives are reduced to catalytically active metal.The method used for the binding of chiral 5 to the polymer probably results in the induction of chirality at the linking carbon atom, polymer-*CHOH-(ferrocene derivative).
- Cullen, William R.,Han, Nam Fong
-
p. 269 - 280
(2007/10/02)
-
