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Cyclisation du diméthyl-3,8-nonadiène-2,7-oïque

✍ Scribed by Cl. Daesslé; H. Favre; H. Schinz

Publisher
John Wiley and Sons
Year
1957
Tongue
German
Weight
681 KB
Volume
40
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

3,8‐Dimethyl‐2,7‐nonadienoic acid has been prepared. Its structure corresponds to that of geranic acid with the only difference that it contains an additional CH~2~‐group in the middle of the chain. By the action of a mixture of formic and sulfuric acids a cyclic isomer, analogous to α‐cyclogeranic acid but containing a seven‐membered ring, is obtained in low yield. The main reaction product is a saturated bicyclic lactone, to which the structure of a spirane with two five‐membered rings is assigned.

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