Nickel-catalyzed [3 + 2] Cycloaddition of α,β-Unsaturated Ketones with Vinyl Oxiranes
作者:Saori Sako、Takuya Kurahashi、Seijiro Matsubara
DOI:10.1246/cl.2011.808
日期:2011.8.5
A nickel-catalyzed cycloaddition of α,β-unsaturated ketones with vinyl oxiranes to afford polysubstituted tetrahydrofurans has been developed. The key intermediate is a five-membered nickelacycle, ...
A nickel-catalyzed [4 + 1] cycloaddition of enones with methylenecyclopropanes leading to dihydrofurans was developed. The reaction outcome is attributed to the transformation of methlenecyclopropane, which is incorporated Into a five-membered ring as a one-carbon fragment.