Retraction Note to: Chemical Papers (2021) 75:4669–4685 10.1007/s11696-021-01640-9
The Editor-in-Chief has retracted this article. After publication, Dr Michal Šoral (Slovak Academy of Sciences) raised concerns with respect to the complete inconsistency of the NMR spectra presented in the Supplementary Information files with the assigned structure of the key compound cyanorona-20 ((E)-N(4-cyanobenzylidene)-6-fluoro-3-hydroxypyrazine-2-carboxamide) in this article. Independent post-publication peer review supported these concerns and verified that there is overlap of the NMR spectra with those in a previously published article (Rabie 2020). In addition, independent efforts to reproduce the synthesis of cyanorona-20 were unsuccessful. The Editor-in-Chief therefore no longer has confidence in the results and conclusions presented. The author does not agree with this retraction.
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Reference
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