Tetrahedron Letters p. 4521 - 4524 (1991)
Update date:2022-08-11
Topics:
Hatanaka, Minoru
Himeda, Yuichiro
Ueda, Ikuo
Allylidene triphenylphosphorane 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.
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