Ring expansion of trans-divinyl ethylene oxide by oxonium ylide [2,3] sigmatropic rearrangement
作者:Kevin J. Quinn、Neal A. Biddick、Brian A. DeChristopher
DOI:10.1016/j.tetlet.2006.08.023
日期:2006.10
Oxonium ylide [2,3] sigmatropicrearrangement of trans-divinyl ethylene oxide is observed upon its exposure to ethyl or t-butyl diazoacetate in the presence of either Rh(II) or Cu(II) catalysts to produce cis-6-vinyl-3,6-dihydropyran-2-carboxylates.