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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 275-284 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Peptides 119.  -  Peptide Synthesis with N-Carboxy-α-amino Acid AnhydridesOn reaction of N-carboxy-α-amino acid anhydrides (NCA) with equimolar amounts of amino-acids or excess NCA in potassium borate buffer of pH 10.2 (0°C) considerable amounts of homo-oligomers and homopolymers are formed. If an excess of amino acid is used formation of the above mentioned by-products can be suppressed. The extent of homooligomerization and homopolymerization and hydrolysis occurring during the reaction of NCA under the conditions of peptide synthesis is described.
    Notes: Bei der Umsetzung von N-Carboxy-α-aminosäureanhydriden (NCA) in äquimolaren Mengen oder im überschuß mit Aminosäuren in Kaliumborat-Puffer vom pH 10.2 (0°C) wurde die Bildung beachtlicher Mengen Homooligomere und Homopolymere beobachtet. Durch überschüssige Aminokomponente konnte die Bildung dieser Nebenprodukte unterdrückt werden. Das Ausmaß der Homooligomeren- und Homopolymerenbildung sowie das der Hydrolyse während der Reaktion von NCA unter Peptidsynthesebedingungen wird beschrieben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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