METODĂ DE SINTEZĂ A RACEMATULUI DE 8-METILDECAN-2-IL PROPANOAT, COMPONENTA DE BAZĂ A FEROMONULUI SEXUAL AL VIERMELUI VESTIC AL RĂDĂCINILOR DE PORUMB, DIABROTICA VIRGIFERA VIRGIFERA LE CONTE

Andrei NEGUȚA, *Elena NEGUȚA Institutul de Genetică, Fiziologie și Protecția Plantelor *Universitatea de Stat din Moldova

Abstract

METHOD OF SYNTHESIS OF RACEMIC 8-METHYLDECAN-2-YL PROPANOATE, THE BASIC COMPONENT OF THE SEX PHEROMONE OF THE WESTERN CORN ROOTWORM, DIABROTICA VIRGIFERA VIRGIFERA LE CONTE

This paper relates a synthesis method of 8-methyldecan-2-yl propanoate racemate from commercially available chemicals. It implies cross-coupling of 2-bromobutane with Grignard reagent formed of hexamethylene chlorohydrin and magnesium. The obtained 7-methylnonan-1-ol is oxidized to aldehyde with pyridinium chlorochromate and coupled with the Grignard reagent obtained from methyl iodide and magnesium. The resulted alcohol was esterified with propanoic anhydride. The racemate of 8-methyldecan-2-yl propanoate is applied as a sex pheromone of the western corn rootworm.

Keywords: 8-methyldecan-2-yl propanoate, 8-methyldecan-2-ol, 7-metthylnonan-1-ol, 7-methylnonanal, Diabrotica virgifera virgifera Le Conte, synthesis, pheromones, western corn rootworm.