Expression of concern: A general and concise asymmetric synthesis of sphingosine, safingol and phytosphingosines via tethered aminohydroxylation

Abstract

Expression of concern for ‘A general and concise asymmetric synthesis of sphingosine, safingol and phytosphingosines via tethered aminohydroxylation’ by Pradeep Kumar et al., Org. Biomol. Chem., 2010, 8, 5074–5086.

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The following article ‘A general and concise asymmetric synthesis of sphingosine, safingol and phytosphingosines via tethered aminohydroxylation’ by Pradeep Kumar, Abhishek Dubey and Vedavati G. Puranik has been published in Organic & Biomolecular Chemistry.

It has been brought to the Executive Editor's attention that there are a number of unexplained discrepancies (visible under magnification) in the NMR spectra presented in the ESI accompanying this article. These have been confirmed by independent review by a member of the Editorial Board.

The affected spectra are: ¹³C NMR spectra for; 16, 19, 20, 26, 39, 34, 35, 36 and 12; ¹H NMR spectra for; 26, 34, 35, 36 and 12.

Following consultation with the authors and the Director of CSIR-National Chemical Laboratory, we have established that archive copies of the original data supporting these spectra are no longer available for comparison. After carrying out an internal review the Director of CSIR-National Chemical Laboratory has determined that there was no intentional altering of the published NMR spectra.

However as the accuracy of these NMR spectra cannot be confirmed the Executive Editor is issuing this notice for readers’ information.

Richard Kelly

20th June 2017

Executive Editor, Organic & Biomolecular Chemistry

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