2530-87-2Relevant academic research and scientific papers
Synthesis and structure of novel Si-substituted silylpropyl derivatives of 2-mercaptobenzoxazole and 2-mercaptobenzothiazole
Grebneva, Ekaterina А.,Bolgova, Yuliya I.,Trofimova, Olga M.,Albanov, Aleksander I.,Borodina, Tatyana N.
, p. 762 - 767 (2019)
[Figure not available: see fulltext.] A previously unknown carbofunctional (trimethoxysilyl)propyl derivative of the 2-mercaptobenzoxazole, C6H4NOCS(CH2)3Si(OMe)3, containing a tetracoordinated silicon atom was synthesized by nucleophilic substitution of the chlorine atom in the (3-chloropropyl)-trimethoxysilane with the benzoxazol-2-ylsulfanyl group. The reaction of 2-[(trimethoxysilyl)propylsulfanyl]benzoxazole or –benzothiazole with boron trifluoride etherate led to a previously unknown hydrolytically unstable Si-fluoropropyl derivatives of 2-mercaptobenzoxazole or 2-mercaptobenzothiazole, C6H4N(Y)CS(CH2)3SiF3 (Y = O, S). By transesterification of 2-[(trimethoxysilyl)-propylsulfanyl]benzoxazole by tris(2-hydroxyethyl)amine, a new silatranylpropyl derivative of 2-mercaptobenzoxazole containing an intramolecular coordination bond N→Si and a pentacoordinated silicon atom, C6H4NOCS(CH2)3Si(OCH2CH2)3N, was obtained.
Synthetic process of silicon-based imidazole epoxy resin curing agent
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Paragraph 0018, (2017/07/21)
The invention discloses a synthetic process of a silicon-based imidazole epoxy resin curing agent and belongs to the technical field of synthesis of curing agents. The synthetic process comprises the following steps: taking chloropropyl trichlorosilane and alcohol as raw materials, synthesizing chloropropyl siloxane by adopting a continuous method and then conducting reaction with an imidazole substance to obtain the silicon-based imidazole epoxy resin curing agent. The synthetic process of the silicon-based imidazole epoxy resin curing agent, disclosed by the invention, has the benefits that some raw materials used in the production process are simple and easy to obtain; in the whole production process, conditions are milder, the operation is simple, the equipment requirements are low, and high temperature, high pressure and other special processes are not required, so that the safety and the economy are good; wastewater containing COD is not generated, and byproducts are less; in the first step of esterification, no waste is generated, by-product hydrochloric acid is also a product with economic benefits, and the influence on the environment is less; chloropropyl silane is continuously produced, so that the reaction is favorably promoted, and the by-products are reduced.
Synthesis and properties of functionalized alkylalkoxysilanes
Lebedev,Minas’yan,Abramkin,Sheludyakov,Kuzmina,Lebedeva,Surikov,Rybakov
, p. 1859 - 1863 (2016/10/04)
A method of chloroalkylalkoxysilanes synthesis scalable to pilot production has been proposed. Morpholinotrialkoxysilanes have been prepared and studied as vulcanizing agents for low-molecular silicone rubbers. The reaction of N-morpholinomethyltrialkoxysilanes with triethanolamine has afforded N-[(silatranyl)-methyl]morpholine; it has been studied by X-ray analysis.
Hydrosilylation Synthesis of Haloalkylorganosilanes Using Peroxide Promoters
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Paragraph 0110-0111, (2014/05/07)
This invention is directed to a process for producing a haloorganoalkoxysilane product comprising reacting an olefinic halide, an alkoxysilane, a catalytically effective amount of ruthenium-containing catalyst; and a reaction-promoting effective amount of a peroxy compound, optionally in the presence of an electron-deficient aromatic compound.
Synthesis of a multifunctional alkoxysiloxane oligomer
Yoshikawa, Masashi,Wakabayashi, Ryutaro,Tamai, Misa,Kuroda, Kazuyuki
supporting information, p. 5362 - 5368 (2014/12/11)
An alkoxysiloxane oligomer (1, SiMe[OSi(CHCH2)(OMe)2][OSi(CH2)3Cl(OMe)2]2), containing vinyl and chloropropyl groups, was synthesized as a precursor for sol-gel synthesis. Di-tert-butoxymethylhydroxysilane (t-BuO)2MeSiOH was reacted with (MeO)2(CH2CH)SiCl to form (t-BuO)2MeSiOSi(CHCH2)(OMe)2 which was further alkoxysilylated with Cl(CH2)3SiCl(OMe)2 to form 1. The 1H, 13C, 29Si NMR and HR-MS data confirmed the formation of 1, indicating the successful synthesis of an alkoxysiloxane oligomer possessing different kinds of functional groups by a chemoselective route. Hydrolysis of 1 under acidic conditions was completed in a few hours. The solution state 29Si NMR spectra of samples hydrolyzed and condensed at various reaction times show no signals due to species generated by the cleavage of the siloxane bonds in 1, indicating the validity of the synthesized substance as a precursor for the formation of hybrids with homogeneously distributed functional groups. Intramolecular condensation of 1 to form cyclic trisiloxane units proceeds more preferentially than intermolecular condensation.
METHOD OF PRODUCING A HYDROLYZABLE SILICON-CONTAINING COMPOUND
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Page/Page column 18-19; 20, (2012/07/14)
The present invention provides a safe, inexpensive, and high yield means of producing a hydrolyzable silicon-containing compound, e.g., an organooxysilane and the like. A compound (A) represented by the general formula R1-O-R2 wherein R1 represents a C4-30, substituted or unsubstituted, tertiary alkyl group or aralkyl group and R2 represents a C1-30, substituted or unsubstituted, monovalent hydrocarbyl group or acyl group, is reacted in the presence of a Lewis acid catalyst with a halosilane (B) represented by the general formula R3mSiX4-m wherein R3 represents the hydrogen atom or a C1-30 substituted or unsubstituted monovalent hydrocarbyl group, X is independently bromine or chlorine, and m represents an integer from 0 to 3.
Practical conversion of chlorosilanes into alkoxysilanes without generating HCl
Wakabayashi, Ryutaro,Sugiura, Yasushi,Shibue, Toshimichi,Kuroda, Kazuyuki
supporting information; experimental part, p. 10708 - 10711 (2011/12/05)
Alcohol-free: A versatile, efficient, and practical synthesis of alkoxysilanes without generation of HCl involves the reaction of chlorosilanes with unsymmetrical ethers in the presence of a Lewis acid (see scheme). The reaction proceeds through selective cleavage of C-O bonds and is superior to conventional processes. Industrially feasible reagents are used and only one by-product results. Copyright
PROCESS FOR THE PREPARATION OF HALOALKYLALKOXYSILANCS AND HALOALKYLHALOSILANES
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Page/Page column 22, (2009/10/22)
This invention involves a process for the preparation of haloalkylalkoxysilanes and haloalkylhalosilancs. The process comprises reacting an alkoxyhydridosilane or a halohydridosilanc silane with an alkenylhalide compound in the presence of a catalytic amount of an iridium containing catalyst. When a halohydridosilane is the silane rcactant. the resulting haloalkylhalosilane may be alkoxylatcd by reaction with a C1-C6, alcohol, In another aspect of the invention, the reacting is conducted under a reduced oκygen atmosphere to improve the catalyst activity and the yield of the resulting haloalkylhalosilane or halυalkylalkυx vsi lane.
PROCESS FOR MAKING HALOORGANOALKOXYSILANES
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Page/Page column 12, (2008/06/13)
A haloorganoalkoxysilane is prepared by reacting an olefinic halide with an alkoxysilane in which the alkoxy group(s) contain at least two carbon atoms in a reaction medium to which has been added a catalytically effective amount of ruthenium-containing catalyst and a reaction-promoting effective amount of an electron-donating aromatic compound promoter. The process can be used to prepare, inter alia, chloropropyltriethoxysilane, which is a key intermediate in the manufacture of silane coupling agents.
Process for making haloorganoalkoxysilanes
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Page 4; 5, (2010/02/08)
A haloorganoalkoxysilane is prepared by reacting an olefinic halide with an alkoxysilane in which the alkoxy group(s) contain at least two carbon atoms in a reaction medium to which has been added a catalytically effective amount of ruthenium-containing catalyst and a reaction-promoting effective amount of an electron-donating aromatic compound promoter. The process can be used to prepare, inter alia, chloropropyltriethoxysilane, which is a key intermediate in the manufacture of silane coupling agents.
