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Synthesen in der Vitamin-A2-Reihe. 1. Mitteilung. Die Darstellung von kristallinem all-trans-Vitamin A2 und von zwei Isomeren mit sterischer Hinderung

✍ Scribed by U. Schwieter; G. Saucy; M. Montavon; C. v. Planta; R. Rüegg; O. Isler

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

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✦ Synopsis

Abstract

Crystalline all‐trans‐vitamin A~2~ has been prepared from dehydro‐β‐C~14~‐aldehyde and the isomeric 3‐methyl‐pent‐2‐en‐4‐yn‐1‐ols. Two vitamin A~2~ isomers with Pauling hindrance (11‐cis and 11, 13‐di‐cis) have been synthesized from the same starting materials.

📜 SIMILAR VOLUMES

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✍ U. Schwieter; C. V. Planta; R. Rüegg; O. Isler 📂 Article 📅 1962 🏛 John Wiley and Sons 🌐 German ⚖ 832 KB

## 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. 3. Mitteilung. Anwendung der WITTIG-Reaktion zur Synthese von all-trans- und 13-cis-Vitamin A2
✍ U. Schwieter; C. V. Planta; R. Rüegg; O. Isler 📂 Article 📅 1962 🏛 John Wiley and Sons 🌐 German ⚖ 490 KB

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