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Technische Verfahren zur Synthese von Carotinoiden und verwandten Verbindungen aus 6-Oxo-isophoron. V. Synthese von Astacin

✍ Scribed by Erich Widmer; Teodor Lukáč; Reinhard Zell; Kurt Bernhard

Publisher
John Wiley and Sons
Year
1982
Tongue
German
Weight
693 KB
Volume
65
Category
Article
ISSN
0018-019X

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✦ Synopsis

Technical Procedure for the synthesis of Carotenoids and Related Compounds from 6‐Oxo‐isophoroneTeil 4 dieser Reihe: [1].

. V. Synthesis of Astacene

Starting from optically inactive astaxanthin intermediates, the highly oxygenated carotenoid astacene was synthesized in seven steps (55% overall yield from 6‐oxo‐isophorone). Key features of the new approach are base‐ and acid‐catalyzed rearrangements of acetylenic intermediates such as those described in Schemes 2, 7 and 8.

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