ALKYLATION OF ACETYLCYCLOPROPANE CYCLOHEXYLIMINE BY ETHYLENE OXIDE DERIVATIVES AS A KEY STEP IN THE SYNTHESIS OF SOME INSECT ACETOGENIN PHEROMONES

Article abstract of DOI:10.1007/BF00863822

The interaction of Li derivatives of acetylcyclopropane cyclohexylimine with ethylene, propylene, and isoprene oxides leads efficiently to the corresponding γ-cyclopropylketols.The cyclopropylcarbinol corresponding to the first of them is smoothly converted under the action of the couple Me3SiBr/ZnBr2 to a linear E-C7-homoallyl bromide, which is then used in the stereocontrolled synthesis of tridec-4E-enyl and trideca-4E,7Z-dienyl acetates - components of the sex pheromones of some Lepidoptera species.Keywords: acetylcyclopropane, insect acetogenin pheromones, homoallyl rearrangement, Julia olefination, olefin oxides.