Tetrahedron Asymmetry p. 213 - 216 (1992)
Update date:2022-08-17
Topics:
Uemura, Motokazu
Miyake, Ryuta
Nishimura, Hikaru
Matsumoto, Yonetatsu
Hayashi, Tamio
New chiral monophosphine ligands 2-4 containing (η6-arene)chromium were prepared via the stereoselective ortho-lithiation od ((R)-N,N-dimethyl-1-phenylethylamine)-Cr(CO)3 (1).Asymmetric cross-coupling of 1-phenylethylmagnesium or zinc reagent with vinyl bromides in the presence of palladium or nickel catalysts complexed with the chiral (η6-arene)chromium ligands gave the coupling products of up to 61 percentee.
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(2021)
