Corrigendum: An Extremely Long-Lived Singlet 4,4-Dimethoxy-3,5-diphenylpyrazolidine-3,5-diyl Derivative: A Notable Nitrogen-Atom Effect on Intra- and Intermolecular Reactivity

Authors

  • Manabu Abe Prof. Dr.,

  • Emi Kubo,

  • Koichi Nozaki Prof. Dr.,

  • Takashi Matsuo,

  • Takashi Hayashi

Errata

This article corrects:

  1. An Extremely Long-Lived Singlet 4,4-Dimethoxy-3,5-diphenylpyrazolidine-3,5-diyl Derivative: A Notable Nitrogen-Atom Effect on Intra- and Intermolecular Reactivity Volume 45, Issue 46, 7828–7831, Article first published online: 24 October 2006

In Scheme 1 of this Communication, formation of the MeO-migrated compound 10 a was reported for the photochemical denitrogenation of azoalkane AZ in benzene. 2D NMR spectroscopic analyses (HMBC, HMQC) of this reaction have now revealed that the product is not compound 10 a but compound 10 a′.

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The HMBC spectrum (see the Supporting Information) shows a clear correlation between the protons of one MeO group (δ=3.31 ppm) and one carbonyl carbon atom (δ=154.74 ppm) as well as the protons of another MeO group (δ=3.14 ppm) and enolic C4 carbon atom (δ=144.37 ppm). These correlations are not consistent with structure 10 a but with structure 10 a′.

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