Volume 47, Issue 27 pp. 4989-4992
Communication

Tandem Catalytic Asymmetric Friedel–Crafts/Henry Reaction: Control of Three Contiguous Acyclic Stereocenters

Takayoshi Arai Prof. Dr.

Takayoshi Arai Prof. Dr.

Department of Chemistry, Graduate School of Science, Chiba University, Inage, Chiba 263-8522 (Japan), Fax: (+81) 43-290-2889 http://synthesis.chem.chiba-u.jp/

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Naota Yokoyama

Naota Yokoyama

Department of Chemistry, Graduate School of Science, Chiba University, Inage, Chiba 263-8522 (Japan), Fax: (+81) 43-290-2889 http://synthesis.chem.chiba-u.jp/

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First published: 16 June 2008
Citations: 138

This research was supported by the Industrial Technology Research Grant Program in 2006 from the New Energy and Industrial Technology Development Organization (NEDO) of Japan and by a Grant-in Aid for Scientific Research on Priority Areas (No. 19028007, “Chemistry of Concerto Catalysis”) from the Ministry of Education, Culture, Sports, Science and Technology (Japan). We thank Prof. Akira Yanagisawa at Chiba University for helpful discussions.

Graphical Abstract

Good things come in threes: Highly functionalized indole derivatives with three contiguous stereocenters were formed in the title reaction of an indole, a nitroalkene, and an aldehyde with the imidazoline–aminophenol catalyst 1–CuOTf in the presence of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). The major isomers of the adducts were obtained with up to 99 % ee. Tf=trifluoromethanesulfonyl, Ts=p-toluenesulfonyl; R=H, Me; R′,R′′=alkyl, aryl.

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