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Copper-Catalyzed Conjugate Addition of Grignard Reagents to Dienoates
T. den Hartog, S. R. Harutyunyan, D. Font, A. J. Minnaard*, B. L. Feringa*
University of Groningen, The Netherlands
19 March 2008 (online)
An efficient copper-catalyzed asymmetric 1,6-conjugate addition of Grignard reagents to linear δ-substituted 2,4-dienoates is reported. Valuable multifunctional intermediates are obtained with excellent regioselectivities (up to 99:1) and high enantioselectivities (up to 97% ee).