The fungus responsible for Dutch elm disease is spread by European bark beetles when they burrow into the tree. Other beetles congregate at the site,...

The fungus responsible for Dutch elm disease is spread by European bark beetles when they burrow into the tree.

Other beetles congregate at the site, attracted by the scent of a mixture of chemicals.

One of the compounds given off by female bark beetles is 4-methyl-3-heptanol.

Suggest an efficient synthesis of this pheromone from alcohols of five carbon atoms or fewer.