Pericyclic reactions of cyclopentadienones with nonactivated olefins in phenolic solvents. Enhancement of the reactivity and periselectivity
作者:Tamaki Jikyo、Masashi Eto、Kazunobu Harano
DOI:10.1016/s0040-4020(99)00259-8
日期:1999.5
pericyclic reactions of cyclopentadienones with olefins involving conjugated medium-ringpolyenes has been investigated. The use of phenols as a solvent accelerates the reaction rates of cycloadditions of cyclopentadienones with nonactivated olefins. In the reaction of cycloheptatriene in p-chlorophenol, the exo [4+6]π cycloadduct was produced predominantly, in which a 15-fold increase of the reaction rate