We report here a simple and atom economic cycloisomerization reaction of indole-tethered alkynols for constructing diverse carbazoles using Cu(OTf)2/HFIP as the excellent promoter system. The reaction proceeds through a one-pot, domino process of spiro cyclization and 1,2-migration followed by aromatization to deliver carbazoles.
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S. Yaragorla, T. Khan and S. Chakroborty, Org. Biomol. Chem., 2024, 22, 3622 DOI: 10.1039/D4OB00421C
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