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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 2073-2078 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Resolution of DL-CysteineThe diastereomeric 4-thiazolidinecarboxylic acids 3 and 4, obtained by condensation of DL-cysteine (DL-1) with D-(+)-galactose (2), can be separated by crystallization. Ring cleavage of 3 or 4 gives L-cysteine (L-1) or D-cysteine (D-1), respectively. Instead of D-(+)-galactose other chiral aldoses can be employed as resolution agents.
    Notes: Die bei der Kondensation von DL-Cystein (DL-1) mit D-(+)-Galactose (2) entstehenden zueinander diastereomeren 4-Thiazolidincarbonsäuren 3 und 4 lassen sich durch Kristallisation trennen. Bei der Ringspaltung von 3 bzw. 4 entstehen L-Cystein(L-1) bzw. D-Cystein (D-1). Statt D-(+)-Galactose kann man auch andere chirale Aldosen einsetzen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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