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N-Acyl dimesylamines. like acyl chlorides, react with 4-dimethylaminopyridine and other tertiary nitrogen bases to give either solid N-acylonium dimesylaminides (1-3). or onium dimesylaminides (e.g. 4) originating from ketene elimination (eq. (5)). The expected acyl transfer properties of N-acylonium dimesylaminides are confirmed by reactions of l a with phenol, 4-nitrophenol, p-thiocresol, and N-methylaniline, and of 1b with phenol, resulting in 0-. S-. or N-acylation, respectively. With exception of compounds 1b and 3, all dimesylaminides could be characterized by their cation and anion mass spectra using field desorption, secondary ion mass spectrometry or fast atom bombardment

zeitschrift für naturforschung b

Polysulfonylamine, XIII [1] N-Acylonium-Salze des Dimesylamins: Synthese und Massenspektren / Polysulfonylamines, XIII [1] N-Acylonium Salts of Dimesylamine: Synthesis and Mass Spectra