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Diethyl bromomalonate (1) reacts with trimethylamine at 0°C to give the bromide salt of trimethylammoniummalonate (2), however, in the presence of methanol, ethanol or 1-butanol the bromide of ethyl trimethylammoniumacetate (3) is obtained under the loss of dialkyl carbonates. The analogous reaction of 1 with dimethylsulfide yields diethyl methylthiomalonate (5).

zeitschrift für naturforschung b

Über Reaktionen mit Betain, ΧΠ. Das Verhalten von Brommalonsäure-diäthylester gegenüber tert. aliphat. Aminen / Reactions with Betaine, XII. The Reaction of Diethyl Bromomalonate with Aliphatic tert. Amines