Specific Synthesis of 1,2- and 1,3-Dialkylidenecycloheptanes by [3+2+2] Cyclization of Alkenyl Fischer Carbene Complexes and Allenes
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- 作者：José ; Barluenga ; Rubé ; n Vicente ; Pablo Barrio ; Luis A. Ló ; pez ; Miguel Tomá ; s ; and ; and Javier Borge
- 刊名：Journal of the American Chemical Society
- 出版年：2004
- 出版时间：November 10, 2004
- 年：2004
- 卷：126
- 期：44
- 页码：14354 - 14355
- 全文大小：57K
- 年卷期：v.126,no.44(November 10, 2004)
- ISSN：1520-5126
文摘
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.