Surveying approaches to the formation of carbon–carbon bonds between a pyran and an adjacent ring
作者:Jeffrey D. Frein、Tomislav Rovis
DOI:10.1016/j.tet.2006.02.042
日期:2006.5
We have examined several methods for the stereoselective formation of carbon-carbonbonds between contiguous rings where a stereogenic center is already present. The approaches investigated were a [1,3] oxygen to carbon rearrangement of cyclic vinyl acetals, an intermolecular enolsilane addition into an in situ generated oxocarbenium ion, an intramolecular conjugate addition of tethered alkoxy enones