Synfacts 2010(12): 1397-1397  
DOI: 10.1055/s-0030-1258896
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag Stuttgart ˙ New York

Combined Acid System for Asymmetric Addition of Boronates to Chromene Acetals

Contributor(s): Hisashi Yamamoto, Patrick Brady
P. N. Moquist, T. Kodama, S. E. Schaus*
Boston University, USA
Further Information

Publication History

Publication Date:
22 November 2010 (online)

Significance

The authors report a Lewis acid ­assisted chiral Brønsted acid system for the asymmetric addition of boronates to chromene acetals. The chromene products are obtained in good yields with high enantioselectivities. This method should prove to be useful in the synthesis of natural products.