Cyclopentenones from Allylidene Triphenylphosphoranes and α-Halocarbonyl compounds
作者:Minoru Hatanaka、Yuichiro Himeda、Ikuo Ueda
DOI:10.1016/0040-4039(91)80029-6
日期:1991.1
Allylidenetriphenylphosphorane 3 reacted with α-haloketones and α-halothioesters to give 2-ethoxycyclopentadienes via a [3+2] annulation process in the presence of base. Mild acid treatment of the 2-ethoxycyclopentadienes provided a new route to cyclopentenones.