A simple approach for the synthesis of pyridoindolone scaffolds with a spiroannulated tetrahydrofuran ring is described. The overall process comprises intramolecular sequential gold-catalysed 5-endo-dig alkynol cycloisomerization and subsequent addition of indole C2 to the in situ generated oxocarbenium cation.
M. H. Shinde and C. V. Ramana, Org. Biomol. Chem., 2022, 20, 2086 DOI: 10.1039/D1OB02483C
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