Antifeedants, or food deterrents, are substances that, by acting on the sense of taste of insects, entirely or partially inhibit their feeding and can be used to reduce the population of harmful species. Antifeedants have the advantage of low toxicity and high selectivity towards selected groups of pests, providing an alternative to the classically used insecticides, which usually have a broad spectrum of action and greater toxicity, even towards vertebrates. Among their numerous activities, lactones can exhibit antifeedant properties. However, the use of natural lactones as antifeedants is limited due to their low isolation yields from natural sources and complex chemical synthesis. Therefore accesible synthetic compounds are of great interest. This work presents the synthesis pathways and the deterrent activities of the lactones obtained in convenient transformations, often from natural terpene precursors.
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Opracowano metodę syntezy nieopisanych w literaturze esterkwatów amoniowych na bazie akrylanu i metakrylanu choliny z anionami organicznymi oraz nieorganicznymi. Syntezowane sole okazały się być cieczami jonowymi. Przedstawiono wyniki badań ich aktywności deterentnej na dorosłych osobnikach wołka zbożowego (Sitophilus granarius) oraz trojszyka ulca (Tribolium confusum) jak i larwach skórka zbożowego (Trogoderma granarium) oraz trojszyka ulca (Tribolium confusum).
EN
CH2=CRCOO(CH2)2NMe3Cl (R = H or Me) were converted to resp. salicylates, D,L-lactates, saccharinates, nitrates(V) or acesulfam salts (ionic liqs.), identified and studied for their deterrent activity on adults of wheat weevil (Sitophilus granarius) and confused flour beetle (Tribolium confusum) as well as on larvae of Khapra beetle (Trogoderma granarium) and confused flour beetle (Tribolium confusum). Most of the prepd. ionic liqs. showed a biolog. activity but lower than that of azadirachtidine used for comparison.
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