- Method for preparing silicone acrylate by using Piers-Rubinsztajn reaction
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The invention relates to a method for preparing silicone acrylate by using a Piers-Rubinsztajn reaction. The method includes the steps that tris (pentafluorophenyl) borane is used as a catalyst, different kinds of hydrosilane and acrylates are adopted as raw materials, the materials are dropwise added in an organic solvent system, after stirring is carried out for 30-120 min under a condition of 0-50 DEG C, through the Piers-Rubinsztajn reaction, triethylamine or alkaline alumina with equal moles of a borane catalyst is added to neutralize the catalyst, after stirring is carried out for half an hour, and after filtration and distillation, the corresponding silicone acrylate is obtained. The method for preparing the silicone acrylate is carried out on the basis of the Piers-Rubinsztajn reaction, and the method has the characteristics of high reaction efficiency, high controllability, environmental friendliness and the like.
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Paragraph 0041-0042
(2020/01/03)
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- PROCESS FOR SILYLATING MONOCARBOXYLIC ACIDS
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A process for preparing silylated monocarboxylic acids by reacting C2-C10-monocarboxylic acids with halosilanes of the general formula (I) SiHal4-xRx??(I) in which Hal is a halogen atom selected from the group of fluorine, chlorine, bromine and iodine, R is independently hydrogen, Cl-C10-alkyl or aryl and x is an integer of 0 to 3 to form hydrogen halide in the presence of an auxiliary base, wherein the auxiliary base and the hydrogen halide form a salt which forms two immiscible phases with the product of value or the solution of the product of value in a suitable solvent and is removed.
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Page/Page column 4
(2010/06/22)
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- Process for the preparation of trialkylsilylated carboxylate monomers, the obtained trialkylsilylated carboxylate monomers and their use in antifouling coatings
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Process for the preparation of trialkylsilylated carboxylate monomers of general formula (I) wherein R1, R2, R3 each independently represent an alkyl or an aryl group, R4 represents a hydrogen atom or a methyl group or ―CH2-COOSiR1R2R3 wherein R1, R2, R3 are as already defined, R5 represents a hydrogen atom, an alkyl group or ―COOR6 wherein R6 represents an alkyl group or SiR1R2R3 wherein R1R2R3 are as already defined, which process comprises the steps of reacting:an acyloxysilane of formula (II)R7-COO-SiR1R2R3 wherein R1, R2, and R3 are as already defined above and, R7 is a hydrogen atom, a C1-C3 alkyl group, a partially or totally hydrogenated C1-C3 alkyl groupwith an unsaturated carboxylic acid of formula (III), wherein R4 is a hydrogen atom or a methyl group or CH2COOH and, R5 has the same meaning as that defined above.
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- A FACILE PROCEDURE FOR O-TRITYLATION
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The title operation is achieved via readily accessible organosilicon compounds.
- Murata, S.,Noyori, R.
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p. 2107 - 2108
(2007/10/02)
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