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Synfacts 2009(11): 1242-1242
DOI: 10.1055/s-0029-1218082
DOI: 10.1055/s-0029-1218082
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag
Stuttgart ˙ New York
Copper-Catalyzed Asymmetric Conjugate Boration of Cyclic Enones
I-H. Chen, L. Yin, W. Itano, M. Kanai*, M. Shibasaki*
The University of Tokyo, Japan
Weitere Informationen
Publikationsverlauf
Publikationsdatum:
22. Oktober 2009 (online)
Significance
Highly enantioenriched tertiary organoboronic esters are obtained from copper-catalyzed conjugate boration reactions. The catalyst system consists of CuPF6(MeCN)4, the chiral QuinoxP* ligand and lithium tert-butoxide. The authors rationalized that a catalytic amount of LiPF6 was generated in the reaction that accelerates the catalytic cycle, therefore lithium salt is essential to this reaction.