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Synfacts 2010(12): 1397-1397
DOI: 10.1055/s-0030-1258896
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
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.