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Total synthesis of (±)chokol-A via an intramolecular type-I-magnesium ene reaction.

✍ Scribed by Wolfgang Oppolzer; Allan F. Cunningham

Publisher: Elsevier Science
Year: 1986
Tongue: French
Weight: 224 KB
Volume: 27
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)85239-9

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## Abstract The racemic sesquiterpene isocomene (**1**) has been synthesized starting from 1,7‐octadien‐3‐one (**2**) in a stereoselective manner __(Scheme 2)__. In the key step **4** → **5** the C(7), C(8)‐bond was formed by an intramolecular thermal ene reaction. Further elaboration of **5** invo