A method for the assembly of fully substituted furans containing a 3,4-fused 5–8-membered carbocycle, heterocycle, or spirocycle from rhodium(I)-catalyzed and 1,1,1,3,3,3-hexafluoroisopropanol (HFIP)-assisted cascade annulation of 1,n-diynyl nitrones has been developed.
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Yu et al. (2024) studied this question.
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