4.5 Article

Triflic-Acid-Catalyzed Friedel-Crafts Reaction for the Synthesis of Diaryl Sulfones

Journal

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2022, Issue 26, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.202200477

Keywords

Acid catalysis; Diaryl sulfones; Friedel-Crafts; Triflic Acid; Synthetic methods

Funding

  1. Ruprechts-Karls-University Heidelberg (University of Heidelberg)
  2. BASF SE

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The Friedel-Crafts sulfonylation for the synthesis of diaryl sulfones derivatives was achieved using triflic acid as the catalyst. The method showed good to excellent yield and high selectivity, and the catalyst and excess arene could be easily recovered and re-used.
The Friedel-Crafts sulfonylation for the synthesis of diaryl sulfones derivatives was achieved by using triflic acid (TfOH) as the acidic catalyst with aryl sulfonyl chlorides and arenes at elevated temperatures. Different sulfones could be synthesized with this method in good to excellent yield and with high selectivity. In contrast to the previous methodology reported for this sulfonylation, the catalyst and the excess of arene could be easily recovered and re-used in further batches.

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