Synthesis of (+/-)-leucomalure [(3Z,6R*,7S*,9R*,10S*)-cis-6,7-cis-9,10-diepoxy-3-henicosene], the major components of the female sex pheromone of the satin moth.

The racemate of leucomalure [(3Z,6R*,7S*,9R*,10S*)-cis-6,7-cis-9,10-diepoxy-3-henicosene (1)] and its (3Z,6R*,7S*,9S*,10R*)-isomer were synthesized via acetylenic intermediates in an unambiguous manner.