TfOH-promoted synthesis of indoles and benzofurans involving cyclative transposition of vinyl ketone.
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DOI: 10.1039/d2cc03730k
Abstract: A metal-free approach to construct indole rings from vinylogous amides derived from o-alkynylanilines involving a cyclization, retro-aza-Michael reaction and amine trapping cascade is reported here. This atom-economical transformation has been extended to synthesize benzofuran derivatives… read more here.
Keywords: benzofurans involving; involving cyclative; indoles benzofurans; synthesis indoles ... See more keywords