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Keywords:

  • alkynes;
  • ammonia;
  • carbonylation;
  • quinones;
  • rhodium
Thumbnail image of graphical abstract

Cycle surprise: Ethyne as well as phenylactylene react with synthesis gas to hydroquinones in the presence of a Rh-phosphine catalyst. Especially in case of phenylacetylene, the presence of ammonia is essential for the reaction.