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  • 1995-1999  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 128 (1997), S. 1297-1300 
    ISSN: 1434-4475
    Keywords: Vitamin D ; Vitamin D A-ring fragment ; C-1 Hydroxylation ; Hg(OOCCF3)2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Umsetzung des Benzoats von (S)-(Z)-2-(5-(tert-Butyldimethylsiloxy)-2-methylencyclohexyliden)-ethanol (5) mit 2.5 Äquivalenten Hg(OOCCF3)2 in trockenemTHF führt zu einer selektiven allylischen Hydroxylierung. Damit ist das an C-1 funktionalisierte Vitamin D A-Ring-Fragment6 in einem einzigen Schritt in einer Ausbeute von 65 bis 70% zugänglich.
    Notes: Summary When the benzoate of (S)-(Z)-2-(5-(tert-butyldimethylsiloxy)-2-methylencyclohexyliden)-ethanol (5) is treated with 2.5 equivalents of Hg(OOCCF3)2 in dryTHF, a smooth and selective allylic hydroxylation occurs. The C-1 functionalized vitamin D A-ring synthon6 is isolated in 65 to 70% yield in a single step.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 18 (1996), S. 355-360 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A modified cDNA of mature human apolipoprotein A-II (apoA-II) was expressed by a sterol-uptake yeast strain (erg 10) of Saccharomyces cerevisiæ. ApoA-II cDNA was fused with a modified yeast alpha factor leader peptide coding sequence under phosphoglycerate kinase promoter control in a 2 micron-based plasmid construction. The use of cholesterol allowed apoA-II secretion in the culture medium. The mono and dimeric forms of apoA-II (approximately 3 micrograms per ml) were detected.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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