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Wie in der guten alten Zeit? Die Bildung von 5(4H)‐Oxazolonen wird in der Peptidchemie üblicherweise vermieden. Ergebnisse zeigen nun aber, dass 5(4H)‐Oxazolone als Zwischenstufen bei der Peptidbildung durch Cyanamid‐ und Carbodiimid‐Aktivierung in wässriger Lösung auftreten (siehe Schema).
The early days: Although considered a species to be avoided in peptide chemistry, the intermediacy of 5(4H)‐oxazolones is demonstrated to be essential for the formation of peptides through cyanamide and carbodiimide activation in aqueous solution (see scheme).
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