An ethylene and terminal olefin equivalent in [4 + 2] .pi. cycloadditions. General synthetic application of phenyl vinyl sulfone to the construction of functionalized six-membered rings
Dienophilic properties of phenyl vinyl sulfone and trans-1-(phenylsulfonyl)-2-(trimethylsilyl)ethylene. Their utilization as synthons for ethylene, 1-alkenes, acetylene, and monosubstituted alkynes in the construction of functionalized six-membered rings via [4 + 2] .pi. cycloaddition methodology