Additions and corrections
Dialkyl aluminium amides: new reagents for the conversion of C=O into C=NR functionalities
John C. Gordon, Piyush Shukla, Alan H. Cowley, Jamie N. Jones, D. Webster Keogh and Brian L. Scott
Chem. Commun., 2002, 2710 (DOI: 10.1039/b203693b). Amendment published 29th November 2002
In the Notes and references section the authors would like to replace the synthetic procedures relating to α-Diimines 4–6 and β-aminoenones 7–9 as follows (the correction and omission involved are highlighted in bold):
(b) α-Diimines 4–6 and β-aminoenones 7–9. The α-diimines 4–6 were prepared by addition of a toluene solution of the aminoalane complex 1, 2, or 3 to an equimolar quantity of 2,3-butanedione in toluene solution. In each case, the resulting solution was treated with methanol and DI water, followed by extraction with CHCl3. After drying over MgSO4, the organic layer was filtered through a frit fitted with a pad of alumina. Colorless crystals of 4 and 5 were obtained by storage of saturated 2:1 pentane–Et2O solutions overnight at -30 °C. Crystals of 6 were obtained in a similar fashion from a 5:1 pentane–Et2O solution. The β-aminoenones 7–9 were prepared by addition of a toluene solution of 1, 2, or 3 to a toluene solution of 2,4-pentanedione. (The use of either 1:1 or 2:1 mole ratios of aminoalane:diketone produced the same result.) In the case of 9, the stirred reaction mixture was refluxed for 45 h, while for 7 and 8 the reaction mixture was stirred for 90 h at ambient temperature. Crystals of 8 and 9 were grown in the same manner as 4 and 5, while crystals of 7 were grown as described for 6.
The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.