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The preparation method of alkoxyhydrosilane

A technology of alkoxyhydrosilane and halohydrosilane, which is applied in the field of preparation of organic alkoxyhydrosilane, and can solve problems such as side reactions of hydrosilyl groups

Active Publication Date: 2016-01-20
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in silane compounds having Si-H, there is a problem that a side reaction in which a hydrosilyl group is alkoxylated is likely to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] In the production method of the silane compound of the present invention, a solvent can also be used.

[0055] The atmosphere for carrying out the reaction is not particularly limited, but it is preferable to carry out the reaction in an atmosphere such as dried air, nitrogen, or argon. From the viewpoint of ease of management and economic efficiency, it is more preferable to use dried nitrogen gas.

[0056] The alkoxyhydrogensilane (A) produced by the present invention can be used in the hydrosilylation reaction using Si-H, the Si-OR 8 hydrolysis, condensation reactions, etc. In addition, the heteromethyl group of the alkoxyhydrogensilane (A) can be used for conversion to another substituent or can increase the reactivity of the hydrolyzable group on silicon. In addition, as proposed in JP-A-59-148791 and JP-A-2-270889, it is also possible to use a Grignard reagent by reacting a chloromethyl group with Mg.

[0057]Specific uses of the alkoxyhydrogensilane compound (...

Embodiment 1

[0064] 400 mmol of trimethyl orthoformate (manufactured by Wako Pure Chemical Industries, Ltd.) was placed in a reaction container filled with zeolite and replaced with a dry nitrogen atmosphere, and the temperature was kept at around 70°C. Using a syringe pump, 150 mmol of chloromethyldichlorosilane was added to the trimethyl orthoformate liquid over about 60 minutes. The NMR spectrum of the reaction solution was measured 60 minutes after the addition, and the resulting formation ratio was chloromethyldimethoxysilane (ClCH 2 Si(OCH 3 ) 2 H) is 97mol%, chloromethyltrimethoxysilane (ClCH 2 Si(OCH 3 ) 3 ) is 3mol%.

Embodiment 2

[0066] 850 mmol of trimethyl orthoformate (manufactured by Wako Pure Chemical Industries, Ltd.) was placed in a reaction vessel filled with zeolite and replaced with a dry nitrogen atmosphere, and the temperature was kept at around 60°C. Using a syringe pump, 400 mmol of chloromethyldichlorosilane was added to the trimethyl orthoacetate liquid over about 120 minutes. The NMR spectrum of the reaction solution was measured 10 minutes after the addition, and the resulting formation ratio was chloromethyldimethoxysilane (ClCH 2 Si(OCH 3 ) 2 H) is 98mol%, chloromethyltrimethoxysilane (ClCH 2 Si(OCH 3 ) 3 ) is 2mol%.

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Abstract

The present invention provides a method for producing an alkoxyhydrosilane. Provided is a method for producing an alkoxyhydrosilane (A), comprising a reaction of a halohydrosilane (B) represented by formula (1) : H-SiR 2 c (CR 1 3-b Y b ) a X 3-a-c wherein R 1 is a hydrogen atom or a hydrocarbon group; R 2 is a hydrocarbon group; X is a halogen atom; Y is a hetero substituent; a is 1 or 2; b is 1, 2 or 3; and c is 1 or 0, with an orthoester (C) at a molar ratio of the orthoester (C) to the halohydrosilane (B) of constantly not less than 1, to produce the alkoxyhydrosilane (A) represented by formula (3) : H-SiR 2 c (CR 1 3-b Y b ) a (OR 8 ) 3-a-c wherein R 8 is a hydrocarbon group.

Description

technical field [0001] The present invention relates to a process for the preparation of organoalkoxyhydrogensilanes having hetero substituents at the alpha position of silicon. Background technique [0002] General formula (3): [0003] H-SiR 2 c (CR 1 3-b Y b ) a (OR 8 ) 3-a-c (3) [0004] (where, R 1 , R 2 , R 8 , Y, a, b, c are the same as above. The alkoxysilane (A) represented by ) is a unique compound, characterized in that it has an alkoxy group on silicon, a hydrogen group, and a hydrocarbon group with a hetero substituent at the α position (hereinafter, sometimes also referred to as hetero methyl (heteromethyl). As a general method of preparing an alkoxysilane compound, the method of making a corresponding chlorosilane and alcohol react is mentioned. However, in a silane compound having Si—H, there is a problem that a side reaction in which a hydrosilyl group is alkoxylated is likely to occur. In particular, the heteromethyl-containing silane compou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18
CPCC07F7/188
Inventor 若林克勇
Owner KANEKA CORP
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