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Synlett 1991; 1991(10): 728
DOI: 10.1055/s-1991-34780
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Detailed Procedures for the Preparation of Dimethoxycarbenium and Trimethyloxonium Tetrafluoroborate

Martyn J. Earle* , Robin A. Fairhurst, Robert G. Giles, Harry Heaney
  • *Department of Chemistry, Loughborough University of Technology, Leicestershire, LE11 3TU, England
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Publication Date:
13 March 2002 (online)

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A detailed procedure is given for the preparation of very pure dimethoxycarbenium tetrafluoroborate (1) from trimethyl orthoformate by the reaction with diethyl ether-boron trifluoride complex and also for its reaction with dimethyl ether in dichloromethane which gives high purity trimethyloxonium tetrafluoroborate (2) in high yield.

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