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Keywords:

  • alkynes;
  • gold;
  • heterocycles;
  • selectivity;
  • synthetic methods
Thumbnail image of graphical abstract

Building bridges with gold: Bridged azaoxa skeletons have been efficiently prepared from easily accessible alkynyloxazolidine substrates under mild reaction conditions (see scheme; Boc=tert-butoxycarbonyl). The reactions were found to proceed with complete control of the regio- and stereoselectivity of the products in the presence of a combined gold/silver and acid catalyst system.