Volume 50, Issue 51 pp. 12262-12265
Communication

Chiral Zinc-Catalyzed Asymmetric α-Alkylallylation and α-Chloroallylation of Aldehydes

Prof. Dr. Shū Kobayashi

Corresponding Author

Prof. Dr. Shū Kobayashi

Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033 (Japan)

Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033 (Japan)Search for more papers by this author
Toshimitsu Endo

Toshimitsu Endo

Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033 (Japan)

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Dr. Masaharu Ueno

Dr. Masaharu Ueno

Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033 (Japan)

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First published: 25 October 2011
Citations: 57

This work was partially supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS), ERATO (JST), NEDO, and GCOE. We would also like to thank Mr. Takeshi Naito (The University of Tokyo) for the X-ray crystal-structure analysis.

Graphical Abstract

Two birds with one stone: In the presence of Zn(OH)2 and a chiral bipyridine ligand, racemic α-substituted allylboronates 2 reacted with aldehydes 1 (see scheme) exclusively in an α-addition fashion to afford various homoallylic alcohols 3 bearing two neighboring stereogenic centers in high yields with high diastereo- and enantioselectivities.

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