Synthesen in der Carotinoid‐Reihe. 10. Mitteilung. Anwendung der Wittig‐Reaktion zur Synthese von Estern des Bixins und Crocetins
Authors:
- 1 January 1957
- journal article
- research article
- Published by Wiley in Helvetica Chimica Acta
- Vol. 40 (5) , 1242-1249
Abstract
A simple and efficient synthesis of norbixin and crocetin diesters is described following the schemes C2 + C2o + C2,=C24 and C3 + C14 + C3 = C20 respectively. By means of the Wittig reaction crocetin di‐aldehyde is condensed with a bromoacetic acid ester and a C14‐dialdehyde with an α‐bromopropionic acid ester. The intermediate tri‐ phenylphosphorane compounds are crystalline and easily isolated in a pure state.Keywords
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