Synthesis of Furo[2,3-b]pyran-2-ones through Ag(I)- or Ag(I)-Au(I)-Catalyzed Cascade Annulation of Alkynols and α-Ketoesters.
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DOI: 10.1021/acs.orglett.7b04027
Abstract: Ag(I)- or Ag(I)-Au(I)-catalyzed cascade annulation of alkynols (5-hexyn-1-ol systems) with α-ketoesters involving a dual activation process (π and σ) has been developed for the first time. This reaction proceeds through cycloisomerization of alkynol to give… read more here.
Keywords: furo pyran; annulation; cascade annulation; annulation alkynols ... See more keywords