The Reaction of α, ω-dichlorodimethylsiloxanes with methylamine
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The reaction ofα,ω-dichlorodimethylsiloxanes with from two to ten silicon atoms in the chain with methylamine has been studied and it has been established that when a solution of the chloride is added to the methylamine at −60°C the reaction takes place with the formation of only α,ω-bis(methylamino)dimethylsiloxanes.
The aminolysis of 1,3-dichlorotetramethyldisiloxane by the addition of a solution of the chloride to a solution of methylamine in high dilution and subsequent boiling gives a 60% yield of N,N′-dimethyloctamethylcyclotetrasil-4,8-diaza-2,6-dioxane.
Heating 1,5-bis(methylamino)hexamethyltrisiloxane with an ammonium sulfate catalyst has given N-methylhexamethylcyclotrisilazadioxane.
KeywordsSulfate Silicon Chloride Ammonium Dioxane
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