Síntese de derivados de ácidos carboxílicos para uso em ecologia química

Abstract

Considering that agricultural pests are among the main threats to farming and, consequently, to agribusiness, control methodologies are increasingly necessary. Currently, pesticides are a major part of the pest control technique. However, with advances in science and technology, sex pheromones are being commonly used to control these pests. The production of these pheromones in Brazil, by the industries, is still small, since there are obstacles such as the reaction time that end up reducing production. Therefore, the use of the strategy is limited and they end up returning to the use of pesticides and pesticides in crops. From this, there was a need to research some long-chain carboxylic acids, in order to synthesize their derivatives in which they have a pheromone function for the control of these insect pests. Therefore, the present work aimed to carry out the synthesis of long chain alcohols (Octadecan-1-ol; Hexadecan-1-ol; 9,12-Octadien-1-ol; 9-Octadecan-1-ol and Dodecan-1- ol) and acetates (Octadecanyl Acetate; Hexadecanyl Acetate; 9,12-Octadecadienyl Acetate; 9-Octadecenyl Acetate and Dodecanyl Acetate). Using a synthetic route already described and making some modifications to reduce toxicity, it was possible to produce all compounds with a yield between 70% - 97%. Where, we can say, comparing to the present yields in syntheses described in the literature, that the mentioned compounds were synthesized with excellence, having their pheromonal function already described in the literature.