Method for synthesizing compound E10, E12-hexadecadienal in sex pheromone of legume pod borer

Abstract

A synthetic method of compound E10, E12-hiago dienal in maruca testulalis geyer sex pheromone is characterized in that the compound adopts trans-2-hexenol and 1, 10-decanediol as the substrate; after halogenating reaction, bromide can be obtained from the trans-2-hexenol which is then reacted with phosphorus tribromide to obtain triphenylphosphine ylide salt; after the esterification reaction of the 1, 10-decanediol, the 1, 10-decanediol protected by acetic ester can be obtained, and then after oxidation reaction, 10-oxo decyl acetate can be obtained; after Witting reaction and then quenching reaction of the triphenylphosphine ylide salt and the 10-oxo decyl acetate, 10, 12-hiago dienal can obtained by separation; after the process of recrystal, trans 10, 12-hiago dienal with transverse structure can be obtained, and then after the oxidation reaction, E10, E12-hiago dienal is obtained. The method of the invention adopts materials which are cheap and easy to be obtained and uses simple and reasonable syntheticroute, the operation is simple and safe, the utilization rate of the materials is high and the main ingredient compound of the maruca testulalils geyer sex pheromone can be synthesized with low cost in a short time.

Description

technical field [0001] The invention relates to a chemical synthesis method of (E10, E12)-hexadecadienal, the main component (E10, E12)-hexadecadienal and its analogs and intermediates of the bean borer insect sex pheromone. Background technique [0002] The bean borer Maruca testulalis Geyer is an important pest of bean crops at present, and it damages leaves, flowers and pods by boring. Due to the short harvest time of leguminous crops, chemical pesticides are used to control bean pod borer and bean borer, and the residual amount is large, which will pollute the bean pods. The larva eats into the bean pods with larvae, which is relatively hidden, and is not easy to be contacted by pesticides. At the same time, the mature larvae pupate after shedding their pods and burrowing into the soil, which also has a certain degree of protection. Therefore, it is extremely difficult to control. During the high-incidence period, farmers usually use methods such as increasing the conce...

AI Technical Summary

Problems solved by technology

Due to the short harvest time of leguminous crops, chemical pesticides are used to control bean pod borer and bean borer, and the residual amount is large, which will pollute the bean pods

The larva eats into the bean pods with larvae, which is relatively hidden, and is not easy to be contacted by pesticides. At the same time, the mature larvae pupate after dropping into the soil, which also has a certain degree of protection. Therefore, it is extremely difficult to control

During the high-incidence period, farmers usually use methods such as increasing the concentration of pesticides, increasing the frequency of use, and using highly toxic pesticides to prevent and control. As a result, a large number of natural enemies have been killed, the ecological balance of the vegetable garden has been destroyed, the pests have become rampant again, and pesticide residues in vegetables have been caused. Severely exceeded the standard, affecting food consumption, and at the same time inducing the resistance of vegetable pests to various conventional chemical pesticides

Bean crops are picked in batches, and the picking periods are close to each other. They have to be picked every 2-3 days during the peak harvest period. After many farmers applied pesticides, they went on the market before the safe interval was reached.

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