𝔖 Bobbio Scriptorium
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Stoffwechselprodukte von Mikroorganismen. 139. Mitteilung. Synthesen in der Sideramin-Reihe: Rhodotorulasäure und Dimerumsäure

✍ Scribed by Jörg Widmer; Walter Keller-Schierlein

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
605 KB
Volume
57
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

t‐Butyl (E)‐O‐acetyl‐Δ^2^‐anhydromevalonate could be prepared. by a Reformatsky reaction of 4‐acetoxybutan‐2‐one and t‐butyl bromoacetate. Condensation of its activated derivatives with the diketopiperazine of N^5^‐hydroxy‐L‐ornithine led to di‐O‐acetyl dimerumic acid, which could be transformed, by ammonolysis, to dimerumic acid, identical with the natural compound. The corresponding acetohydroxamic acid, prepared by acetylation of the diketopiperazine, was identical with natural rhodotorulic acid.

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