Preparation of alkyl(amino)dialkoxysilanes
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United States of America Patent
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Sep 5, 2000
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app pub date -
Dec 23, 1997
filing date -
Dec 23, 1997
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Abstract
Alkyl(amino)dialkoxysilanes are prepared by anhydrously reacting stoichiometric amounts of an alkoxysilane and an alkylaminomagnesium chloride in a reverse addition process. The alkylamino magnesium chloride is preferably prepared in situ by the reaction of a Grignard reagent (RMX) and an alkylamine in a suitable aprotic solvent, such as tetrahydrofuran. The 'alkyl' substituent can be alkyl, arylalkyl or aryl. The reaction can be conducted in the temperature range of from 25.degree. C. to 75 .degree. C., without a catalyst, and the aprotic solvent is recovered for re-use in the process.
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