作者:Adela Sánchez Pelegrí、Mark R. J. Elsegood、Vickie McKee、George W. Weaver
DOI:10.1021/ol0609917
日期:2006.7.1
[GRAPHICS]We report an unexpected ring expansion reaction of an enantiopure fenchone-derived imidazolinium salt during attempts to form copper complexes of the corresponding imidazoline carbene ligand. A N, N'-difenchyl piperazinone was formed in low yield together with the difenchyl-substituted five-membered urea.