Optically active β-ketoiminato cobalt(II) complexes as highly efficient catalysts in enantioselective borohydride reduction of ketones, imines, and α,β-unsaturated carboxylates

Tohru Yamada, Takushi Nagata, Taketo Ikeno, Yuhki Ohtsuka, Asami Sagara, Teruaki Mukaiyama

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27 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)86-93
Number of pages8
JournalInorganica Chimica Acta
Issue number1
Publication statusPublished - 1999 Dec 15



  • Catalysts
  • Cobalt complexes
  • Crystal structures
  • Enantioselective reduction
  • Sodium borohydride

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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