First ketene cycloaddition approach to (±)-junionone
作者:Ihsan Erden、Samuel E. Watson
DOI:10.1016/j.tetlet.2015.12.043
日期:2016.1
Junionone is the firstmonocycliccyclobutanemonoterpenoid isolated from a plant. Of the existing four syntheses of this compound, none employs a ketene cycloaddition to construct the four-membered ring. Herein, we report the first total synthesis of junionone that features a ketene cycloaddition for the synthesis of this compound, starting from the commercially available 1,5-hexadiene.
Bridgehead reactivity, nucleophilic and radical additions, and lithium aluminum hydride reduction of 1-(arylsulfonyl)bicyclobutanes: general access to substituted, functionalized cyclobutanes. Syntheses of (.+-.)-citrilol acetate, (.+-.)-junionone, and the tricyclo[3.3.0.01,4]octane and tricyclo[4.3.0.01,7]nonane ring systems