A new approach was proposed for the synthesis of 9-oxo-2E-decenoic acid, a multifunctional pheromone of queen honeybee (Apis mellifera L.), starting from the available telomer of butadiene and water (2E, 7-octadien-1-ol) using in the key steps partial ozonolysis of the corresponding carbonyl compound, selective oxidation of the conjugated aldehyde into a carboxylic acid, and alkylation of acetoacetic ester to introduce the oxo ...