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.
COREY E. J.; GHOSH A. K., TETRAHEDRON LETT., 28,(1987) N 2, 175-178
作者:COREY E. J.、 GHOSH A. K.
DOI:——
日期:——
Mn(III)-promoted annulation of enol ethers and esters to fused or spiro 2-cyclopentenones
作者:E.J. Corey、Arun K. Ghosh
DOI:10.1016/s0040-4039(00)95679-x
日期:1987.1
Manganese(III)-promoted addition of various 1,3-dicarbonyl compounds to enol ethers or terminal enolesters, followed by hydrolysis of the resulting adducts and base catalyzed aldol cyclization provides an effective process for the synthesis of a wide range of fused and spiro 2-cyclopentenones.