-acetonaphthone was faulty and the results reported in Table 1 of their communication are incorrect. The correct values of the ee's, as determined using an in-house, double-control analysis, are as follows:Additions and corrections
A ruthenium catalyst that does not require an N-H ligand to achieve high enantioselectivity for hydrogenation of an alkyl-aryl ketone
Carolyn G. Leong, Okwado M. Akotsi, Michael J. Ferguson and Steven H. Bergens
Chem. Commun., 2003, 750 (DOI: 10.1039/b212544g). Amendment published 26th June 2003
The authors report that the analysis used to determine the enantiomeric excess (ee) for hydrogenations of 1-acetonaphthone was faulty and the results reported in Table 1 of their communication are incorrect. The correct values of the ee's, as determined using an in-house, double-control analysis, are as follows:
| Catalyst | % ee |
| 5 (trans-RuCl2((R)-(S)-Josiphos)(py)2) | 14(R) |
| 6 (trans-RuCl2((R)-(S)-Josiphos)(1R,2R-dpen)) | 49(S) |
| 7 (trans-RuCl2((R)-(S)-Josiphos)(1S,2S-dpen)) | 31(R) |
The conclusion that high enantioselectivity for hydrogenation of an aryl-aryl ketone can be obtained using a ruthenium catalyst without an N-H bond is therefore not supported by the results presented in the communication. All other data and procedures reported in the communication are correct. The authors sincerely regret any confusion this incident may have caused.
The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.
Back to Issue 6 Contents