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Inhaltsstoffe des Osmanthus-Absolues. 4. Mitteilung: Megastigma-5, 7 (E), 9-trien-4-on und Megastigma-5, 8 (E)-dien-4-on

✍ Scribed by Roman Kaiser; Dietmar Lamparsky

Publisher
John Wiley and Sons
Year
1978
Tongue
German
Weight
496 KB
Volume
61
Category
Article
ISSN
0018-019X

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✦ Synopsis

Constituents of Osmanthus Absolute, 4th Communication. Megastigma‐5, 7 (E), 9‐triene‐4‐one and Megastigma‐5, 8 (E)‐diene‐4‐one

In continuation of our communications on constituents of Osmanthus absolute, we now report on the occurrence of the two title compounds 1 and 2a in this natural substrate (0.01‐0.02% each). Their structures were confirmed by synthesis starting from β‐ionone via the common intermediate 4‐oxo‐β‐ionol (9). Some further minor components bearing corresponding structural features are tabulated in view of possible biogenetic pathways leading to 1 or 2a, respectively.

In order to clarify the olfactory behaviour, we also synthesized some analogous derivatives in the irone series, these substances being not yet found in nature.

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