An Examination of the Scope and Stereochemistry of the Ireland-Claisen Rearrangement of Boron Ketene Acetals
作者:Curtis A. Seizert、Eric M. Ferreira
DOI:10.1002/chem.201304384
日期:2014.4.7
The Ireland–Claisen rearrangement of boron ketene acetals is described. The boron ketene acetalintermediates are formed through a soft enolization that obviates the use of strong bases and the intermediacy of alkali metal enolates. Yields and diastereoselectivities of these rearrangements are very sensitive to the choice of boron reagent, even among those that have been shown to effect quantitative