Gold and Brønsted Acid Catalyzed Hydride Shift onto Allenes: Divergence in Product Selectivity
A series of allenyl ethers can be transformed into various fused or spiro tetrahydrofurans and tetrahydropyrans following a hydride shift/cyclization sequence. A divergence in product selectivity, which depends on the nature of the catalyst used (Au(I) complex or Brønsted acid), was observed.
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|Source:||Journal of the American Chemical Society|
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