Abstract

Racemic stigmolone (8-hydroxy-2,5,8-trimethyl-4-nonanone), the pheromone of myxobacterium Stigmatella aurantiaca, was synthesised in 67% overall yield, using titanium-mediated hydroxycyclopropanation of 2-methyl-5-hexen-2-ol with ethyl isovalerate followed by the base-induced ring opening of the resulting 2-(3-hydroxy-3-methylbutyl)-1-isobutyl-1-cyclopropanol.

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