Enantioselective Conjugate Addition of Alkylboranes Catalyzed by a Copper–<i>N</i>-Heterocyclic Carbene Complex
作者:Mika Yoshida、Hirohisa Ohmiya、Masaya Sawamura
DOI:10.1021/ja304481a
日期:2012.7.25
The first catalytic enantioselective conjugate addition of alkylboron compounds has been achieved. Reactions between alkylboranes and imidazol-2-yl α,β-unsaturated ketones proceeded with high enantioselectivity under the influence of a Cu(I) catalyst system, prepared in situ from CuCl, a new chiral imidazolium salt as a precursor for the N-heterocyclic carbene ligand, and PhOK. Alkylboranes are widely