Una variante sintética para la obtencion de dominicalure racemica- feromona de agregacion del escarabajo de los granos Rhyzopertha dominica F. (Coleoptera, Bostrichidae)

Abstract

The pheromones constitutes a decisive component in the strategies push-pull for the development of ecologically sustainable agricultural systems, the conservation of foods in the human communities and the preventive anti-vectorial control. Due to their specific atractantt action and minimum ecological impact that diminishes the volume and utilization of plaguicides, these substances are applied intensely in the systems of plants protection and stored products. In Cuba several studies are developed on synthetic feasibility of pheromones and their applicability in the population control of insects, mainly the specie Rhyzopertha dominica which causes severe damages in stored grains. Previously reported information details the use of costly reagents and inert conditions
(At, -20 y -25 °C) for carrying out the synthesis of the aggregation pheromone of this specie. Using aldehydes propionic and isobutanal like starting substrates were synthesized, by means of aldolic condensation, selective oxidation with Ag₂O-methanol of monoenic aldehydes, treatment with SOCI ₂ and esterification with 2-pentanol, the respective components of the racemic aggregation pheromone of this species were synthesized. The NMR ¹H-¹³C structural analysis is detailed for target esters and intermediates and an intent of oxidation with TEMPO derivatives is shown.