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Synthesen in der Vitamin-A2-Reihe. 2. Mitteilung. Die Darstellung von vier sterisch ungehinderten Vitamin-A2-Isomeren

✍ Scribed by U. Schwieter; C. V. Planta; R. Rüegg; O. Isler

Publisher
John Wiley and Sons
Year
1962
Tongue
German
Weight
832 KB
Volume
45
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Four crystalline vitamin A~2~ isomers, i.e. all‐trans, 13‐cis, 9‐cis, and 9,13‐di‐cis, as well as the corresponding acids and aldehydes, have been prepared from cis‐ and trans‐dehydro‐β‐ionylideneacetaldehyde.

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Synthesen in der Vitamin-A2-Reihe. 1. Mi
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✍ U. Schwieter; G. Saucy; M. Montavon; C. v. Planta; R. Rüegg; O. Isler 📂 Article 📅 1962 🏛 John Wiley and Sons 🌐 German ⚖ 768 KB

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Four crystalline vitamin A, isomers, i.e. all-trans, 13-cis, 9-&, and 9,13-di-cis, as well as the corresponding acids and aldehydes, have been prepared from cis-and tram-dehydro-p-ion ylideneacetaldehyde. Chemische Forschungsabteilung der F. HOFFMANN-LA ROCHE & Co. A.G., Base1 64. Synthesen in der V

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## Abstract A cyclic hexadepsipeptide containing alternatively N‐methyl‐L‐isoleucine and D‐α‐hydroxy‐isovaleric acid (Fig. 1) has been synthesized. It proved to be identical with Enniatin A, a microbiologically active metabolite isolated in 1947 from __Fusarium oxysporum__ SCHLECHT.