Abstract
Primary alkyl, benzyl, and heteroarylamines are converted both by pentaphenyl- and 2,4,6-triphenyl-pyrylium bromides into the corresponding pyridinium bromides. Pyrolysis of the triphenyl derivatives affords a convenient synthesis of alkyl and benzyl bromides. Alkyl and benzyl chlorides are prepared from the corresponding amines via the 2,4,6-triphenylpyridinium tetrafluoroborates by pyrolysis with a KCl–NaCl–ZnCl2 eutectic.
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