✦ LIBER ✦

Structure and Synthesis of Novel C12 Terpenoids from Quince Fruit (Cydonia oblonga MILL.)

✍ Scribed by Sina Escher; Yvan Niclass

Publisher: John Wiley and Sons
Year: 1991
Tongue: German
Weight: 680 KB
Volume: 74
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19910740119

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✦ Synopsis

Abstract

The structure and synthesis of novel irregular C~12~ terpenoids isolated from quince fruit (Cydonia oblonga MILL.) are described: quince oxepine (= (E)‐2,3,6,7‐tetrahydro‐4‐methyl‐2‐(3‐methylbuta‐1,3 dienyl)oxepine; 3) and the quince oxepanes as a 1:1 mixture of cis‐ and trans‐isomers (= cis‐ and trans‐(E)‐4‐methyl‐2‐(3‐methylbuta‐1,3‐dienyl)oxepane; 4 and 5, resp.). The absolute configurations of the natural compounds have not been determined due to the minute amounts available, but both relative and absolute configurations of synthetic 4 and 5 were established by chemial correlation with (R)‐pulegone.

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