Letter
Unexpected Ring Expansion of an Enantiopure Imidazoline Carbene Ligand
In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.
Abstract

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.
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History
- Published In Issue July 06, 2006
- Received April 26, 2006
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