Synfacts 2007(1): 0064-0064  
DOI: 10.1055/s-2006-955715
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag Stuttgart · New York

Rhodium-Catalyzed Intramolecular [4+2] Cycloaddition

Contributor(s): Hisashi Yamamoto, Joshua P. Abell
K. Aikawa, S. Akutagawa, K. Mikami*
Tokyo Institute of Technology, Japan
Further Information

Publication History

Publication Date:
15 December 2006 (online)

Significance

The intramolecular [4+2] cycloaddition provides products that are either 5,6- or 6,6-fused ring systems which are highly useful in the synthesis of many natural products and intermediates. Several Rh catalysts are available for this type of reaction but only a few are highly enantioselective. The function of the diene on the pre-catalyst has since been overlooked and is evaluated in this paper.