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  • 1
    Electronic Resource
    Electronic Resource
    Novel Diamino and Diimino Thioethers - Chiral Tridentate Ligands for Asymmetric Michael Reactions? (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 1475-1479 
    Details
    ISSN: 1434-193X
    Keywords: Amino alcohols ; Asymmetric catalysis ; Chirality ; Michael additions ; Tridentate ligands ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -Novel C2-symmetric enantiopure β,β′-diamino thioethers 1 and β,β′-diimino thioethers 2 have been prepared from chiral α-amino acids. Nine of these compounds have been screened as ligands, in combination with 13 metal salts, with a view to achieving the enantioselective catalysis of a Michael reaction of a β-oxo ester with methyl vinyl ketone resulting in an optimal ee of 17%.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of Novel C2-Symmetrical Diamino Thioethers Derived from Amino Acids (1997)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1997 (1997), S. 1353-1358 
    Details
    ISSN: 0947-3440
    Keywords: Amino acid derivatives ; Chirality ; N ligands ; Protecting groups ; S ligands ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chiral β-amino alcohols 2, available from natural α-amino acids by reduction, have been converted in a sequence of N-protection, O-activation, thioether formation, and deprotection to novel C2-symmetrical β,β′-diamino thioethers 1, which shall serve as chiral tridentate ligands in late transition metal complexes. Optical purity of compounds 1 was established by amide formation with (+)-O-acetylmandelic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199719970711
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