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Please login to access the full content or check if you have access via Variation 4: Hydrogen Chloride or Fluoride as Condensing Agents

DOI: 10.1055/sos-SD-014-00294

Williams, A. C.; Camp, N.Science of Synthesis, (200314377.

Examples of the reaction using hydrogen chloride as the condensing reagent are the formation of 2H-1-benzopyran-2-ones 8790, while examples of the use of hydrogen fluoride are given for the formation of 3-aryl-2H-1-benzopyran-2-ones 91 (Scheme 28).

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