- Regioselective addition of sulfur dichloride and selenium tetrachloride to diallyldimethylsilane as the method of preparation of eight-membered heterocycles containing silicon and chalcogens
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The electrophilic additiob of sulfur dichloride and selenium tetrachloride to diallyldimethylsilane proceeds strictly according Markownikoff rule and results in the formation of previously unknown saturated silicon-containing heterocycles, 5,5-dimethyl-3,7-dichloro-1,5-thiasilacyclooctane and 5,5-dimethyl-1,1,3,7-tetrachloro-1,5-selena(IV)silacyclooctane. The structure of heterocycles obtained was confi rmed by 1H, 13C NMR spectra, in the case of selenium-containing heterocycle, by 77Se NMR spectrum, among them the 2D HMBC spectrum. Pleiades Publishing, Ltd., 2010.
- Martynov,Makhaeva,Larina,Amosova
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- Gas phase reactions of 1,1-dimethylsilabutadiene
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Pyrolysis of 1,1-dimethyl-1-siletene at 363 deg C in a static reaction vessel produces three major products which are formal dimers of the starting material or the reactive isomer, the siladiene.Reactions with ethylene, propene, vinyltrimethylsilane and butadiene have been examined.Mechanisms leading to the Si2C10H20 products are discussed.The influence of temperature and concentration of coreactant on competing reaction pathways is interpreted.
- Conlin, Robert T.,Namavari, Mohammad
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Read Online
- A method for the preparation of allyl silane (by machine translation)
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The invention provides a method for the preparation of allyl silane, propyl silane of the general formula structure dimerizes as formula (I) as shown; wherein R, R 'and R is the same or different, to keep at least a hydrolisis active group, R, R' and R are independently selected from alkoxy, halogen, alkyl, unsaturated alkyl or aryl group; comprises the following steps: S1, in under the nitrogen atmosphere, will R1 R2 R3 SiR4 , Splicing, the catalyst mixing, heating; S2, in S1 in the mixed solution of first add a certain amount of halogen propylene reaction; S3, the S2 at the reflux temperature of the reactant in the reaction 4 - 6 hours; S4, adding excess halogen propylene, continue to reaction, thermal insulation 30 - 50 minutes; after the completion of the reaction, filtration, purification, to get the dimerizes propyl silane. The present invention provides a preparation method does not need of flammable solvent to participate in the reaction, to avoid production of dangerous, greatly simplifies the process steps and reduce the cost, the production cost of the lowest synthesis in the product, at the same time facile product, the reaction yield is high. (by machine translation)
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Paragraph 0034-0035
(2017/08/31)
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- Zinc mediated allylations of chlorosilanes promoted by ultrasound: Synthesis of novel constrained sila amino acids
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A simple, fast and efficient method for allylation and propargylation of chlorosilanes through zinc mediation and ultrasound promotion is reported. As a direct application of the resulting bis-allylsilanes, three novel, constrained sila amino acids are prepared for the first time. The design and synthesis of the constrained sila analogue of GABA (γ-amino butyric acid) is a highlight of this work. This journal is the Partner Organisations 2014.
- Ramesh, Remya,Reddy, D. Srinivasa
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supporting information
p. 4093 - 4097
(2014/06/10)
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- Selective mono- and di-allylation and allenylation of chlorosilanes using indium
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Allyl and allenyl groups have been introduced into silicon systems by the allylation and allenylation of chlorosilanes using allyl bromide or propargyl bromide with indium. The allylation of chlorosilanes afforded a variety of aryl, aralkyl, and alkenyl substituted allylsilanes. By applying this method, the reactions of 1-bromo-3-methylbut-2-ene, 3-bromo-2-methylprop-1-ene and 3-bromobut-1-ene with chlorosilanes also proceed smoothly to give regioselectively allylic rearrangement products in good yields. Mediated by indium, dichlorosilanes (R2SiCl2) and trichlorosilanes (RSiCl3) can either afford monoallylated silanes or diallylated silanes depending on the amount of allyl bromide and indium used.
- Li, Zhifang,Yang, Chenjun,Zheng, Hongfang,Qiu, Huayu,Lai, Guoqiao
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scheme or table
p. 3771 - 3779
(2009/02/08)
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- Reactions of dilithiobutadienes with monochlorosilanes: Observation of facile loss of organic groups from silicon
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Reactions of 1,4-dilithiobutadienes (from 1,4-diiodo-1,2,3,4- tetraethylbutadiene (1) and 2,2′-dibromobiphenyl (7) with t-BuLi) with Me3SiCl gave siloles (3 and 9a) as the major products. No evidence for a disilylated butadiene was obtained. Use of higher molecular weight chlorosilanes ((allyl)Me2SiCl, BnMe2SiCl, and PhMe 2SiCl) with dibromide 7 gave dimethylsilole 9a and a silane (10a, 10b, or 10c) resulting from trapping of the organic group by the chlorosilane.
- Hudrlik, Paul F.,Dai, Donghua,Hudrlik, Anne M.
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p. 1257 - 1264
(2007/10/03)
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- SUGAR CHAIN-CONTAINING CARBOSILANE DENDRIMER COMPOUNDS, PROCESS FOR PRODUCING THE SAME AND VEROTOXIN NEUTRALIZERS AND ANTIVIRAL AGENTS
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A carbosilane dendrimer compound containing sugar chain in its chemical structure that show neutralizing activity against verotoxin and antiviral activity, and a process for producing the same are provided. Further, a carbosilane dendrimer compound that contains sialyl lactose at its terminus, which can specifically bind and adhered to viruses, is provided.
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- Homoconjugation in allyl silicon derivatives
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New diallyl derivatives of mono- and disilane were obtained and characterized. Fluorescence, 1H, C, and 29Si NMR, as well as IR and Raman spectroscopy were used to show the presence of intramolecular donor-acceptor β-coupling between the silicon atom and the allyl groups, which is realized directly through space by the homoconjugation mechanism (i.e. direct conjugation between vacant 3d orbitals of the silicon atom and the allyl π bonds, not involving σ orbitals of the allyl methylene groups).
- Osadchev,Pushkarev,Nikitina,Shamanin,Skorokhodov
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p. 1378 - 1382
(2007/10/03)
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