New synthetic route to trialkyloxonium salts: alkylation of ethers with acyldialkyl cations
Abstract
Acylium cations or complexes of acyl halides with nonmetal halides (e.g. PhCO+SbF6– or PhCOClSbCl5) react at low temperature with an excess of alkyl ethers (e.g. Me2O or Et2O) giving the corresponding trialkyloxonium salts.