Specific synthesis of 1,2- and 1,3-dialkylidenecycloheptanes by [3+2+2] cyclization of alkenyl Fischer carbene complexes and allenes.
The 1,2- and 1,3-dialkylidenecycloheptane rings are specifically assembled from chromium alkenyl Fischer carbene complexes and allenes via [3+2+2] cyclization reactions. The former cycloadducts are obtained when the cyclization is performed in the presence of 1 equiv of [Ni(cod)2], while the [Rh(cod)Cl]2-catalyzed cyclization leads to the latter cycloadducts.
Barluenga
José
J
Instituto Universitario de Química Organometálica Enrique Moles, Unidad Asociada al CSIC, and Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain. barluenga@uniovi.es
Vicente
Rubén
R
Barrio
Pablo
P
López
Luis A
LA
Tomás
Miguel
M
Borge
Javier
J