Open Access Article
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Expression of concern: Organocatalytic stereoselective synthesis of passifloricin A
Richard
Kelly
Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge, UK CB4 0WF. E-mail: OBC-RSC@rsc.org
First published on 29th June 2017
Abstract
Expression of concern for ‘Organocatalytic stereoselective synthesis of passifloricin A’ by Pradeep Kumar et al., Org. Biomol. Chem., 2012, 10, 1820–1825.
The following article ‘Organocatalytic stereoselective synthesis of passifloricin A’ by Pradeep Kumar, Menaka Pandey, Priti Gupta and Dilip D. Dhavale 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 for; 10, 11, 19, 20, 21 and 22, 1H NMR for; 13, 19, 20, 21, 22 and 1.
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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