Corrieri M, De Crescentini L, Mantellini F, Mari G, Santeusanio S, Favi G. Synthesis of Azacarbolines via PhIO
2-Promoted Intramolecular Oxidative Cyclization of α-Indolylhydrazones.
J Org Chem 2021;
86:17918-17929. [PMID:
34871002 PMCID:
PMC8689645 DOI:
10.1021/acs.joc.1c02217]
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Abstract
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An unprecedented
synthesis of polysubstituted indole-fused pyridazines
(azacarbolines) from α-indolylhydrazones under oxidative conditions
using a combination of iodylbenzene (PhIO2) and trifluoroacetic
acid (TFA) has been developed. This transformation is conducted without
the need for transition metals, harsh conditions, or an inert atmosphere.
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