COMMUNICATIONS 23: The Fmoc compound 23 was prepared from 22 (0.32 g, 1 mmol) as described for 7. Crystallization from ethanol/ether. Yield 0.42 g (93 %); homogeneous (TLC system A); ESI-MS: m/i 448 [ M f ] , 470 [ M + Na]', 492 [ M + 2Na]+.
Eines der ungewöhnlichsten ribosomal synthetisierten und posttranslational modifizierten Polypeptide ist Microcin B17. Die Totalsynthese dieses großen Polypeptidantibiotikums (Formel siehe unten) mit Oxazol‐und Thiazolbausteinen öffnet nun den Weg für das Studium von Struktur‐Aktivitäts‐Beziehungen auf dem Gebiet der Gyrase‐Inhibitoren.
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