Highly Functionalized 4-Alkylidenebicyclo[3.1.0]hex-2-enes by Tandem Michael Addition and Annulation of Electron-Deficient Enynes
作者:Zuliang Chen、Junliang Zhang
DOI:10.1002/asia.200900290
日期:2009.10.5
Rapid access: Highly functionalized 4‐alkylidenebicyclo[3.1.0]hex‐2‐enes can be rapidly constructed by a tandem Michael addition and formal [3+2] cycloaddition of electron deficient enynes with a crotonate‐derived sulfur ylide. The stereochemistry of all three newly formed carbon stereogenic centers and the double bond can be highly controlled in this domino process.