Hypervalent Iodine(III) Reagent Mediated Regioselective Cycloaddition of Aldoximes with Enaminones

Akira Yoshimura, Melissa E. Jarvi, Michael T. Shea, Cody L. Makitalo, Gregory T. Rohde, Mekhman S. Yusubov, Akio Saito, Viktor V. Zhdankin

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Abstract

An efficient oxidative cycloaddition of enaminones with nitrile oxides generated in situ from respective aldoximes using hypervalent iodine reagents has been developed. Reactions of various aldoximes with enaminones in the presence of [hydroxy(tosyloxy)iodo]benzene involved the regioselective cycloaddition reaction resulting in the formation of the 3,4-disubstituted isoxazoles in moderate to good yields. Structures of several isoxazole products were confirmed by a single X-ray crystallography.

Original languageEnglish (US)
Pages (from-to)6682-6689
Number of pages8
JournalEuropean Journal of Organic Chemistry
Volume2019
Issue number39
DOIs
StatePublished - Oct 24 2019

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Keywords

  • Aldoximes
  • Cycloaddition
  • Hypervalent iodine(III) reagents
  • Isoxazoles
  • Regioselectivity

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