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
Expression of concern for ‘Enantio- and diastereocontrolled conversion of chiral epoxides to trans-cyclopropane carboxylates: application to the synthesis of cascarillic acid, grenadamide and L-(−)-CCG-II’ by Pradeep Kumar et al., Org. Biomol. Chem., 2012, 10, 6987–6994.
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; 11, 13, 17, 20, 15 and 21, 1H NMR spectra for; 17 and 21.
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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