TY - JOUR
T1 - Optically active β-ketoiminato cobalt(II) complexes as highly efficient catalysts in enantioselective borohydride reduction of ketones, imines, and α,β-unsaturated carboxylates
AU - Yamada, Tohru
AU - Nagata, Takushi
AU - Ikeno, Taketo
AU - Ohtsuka, Yuhki
AU - Sagara, Asami
AU - Mukaiyama, Teruaki
PY - 1999/12/15
Y1 - 1999/12/15
N2 - A new class of cobalt complexes with optically active N,N′-ethylenebisketoiminato ligands was synthesized, and one of them was fully characterized by X-ray crystallographic analysis. These cobalt(II) complexes proved to be efficient catalysts in enantioselective borohydride reduction of aryl ketones, phosphinyl imines, and β,β-disubstituted α,β-unsaturated carboxylates. It was found that the enantiofacial discrimination in the borohydride reduction was influenced by the structure of the diphenylethylenediamine moiety of the cobalt complex catalysts.
AB - A new class of cobalt complexes with optically active N,N′-ethylenebisketoiminato ligands was synthesized, and one of them was fully characterized by X-ray crystallographic analysis. These cobalt(II) complexes proved to be efficient catalysts in enantioselective borohydride reduction of aryl ketones, phosphinyl imines, and β,β-disubstituted α,β-unsaturated carboxylates. It was found that the enantiofacial discrimination in the borohydride reduction was influenced by the structure of the diphenylethylenediamine moiety of the cobalt complex catalysts.
KW - Catalysts
KW - Cobalt complexes
KW - Crystal structures
KW - Enantioselective reduction
KW - Sodium borohydride
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U2 - 10.1016/S0020-1693(99)00373-4
DO - 10.1016/S0020-1693(99)00373-4
M3 - Article
AN - SCOPUS:0345917271
VL - 296
SP - 86
EP - 93
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 1
ER -