Method for synthesizing phyllocnistis citrella stainton pheromone compound

Abstract

The invention relates to a method for synthesizing a phyllocnistis citrella stainton pheromone compound. (Z)-7-hexadecene aldehyde is synthesized by using 1,7-heptandiol and bromo-n-nonane as starting materials and through six steps of reactions (comprising a Witting reaction); (Z,Z)-7,11-hexadecadienoic aldehyde is synthesized by using the 1,7-heptandiol, 1,4-butanediol and bromo-n-pentane as starting materials and through multi-step of reactions (comprising two Witting reactions); and (Z,Z,E)-7,11,13-hexadecatrienoic aldehyde is synthesized by using 2-octyne-1-alcohol, 1-iodine-3-chloropropane and trans-2-amylene aldehyde as starting materials and through multi-step of reactions (comprising a coupling reaction and a Witting reaction). The invention has the advantages of low price and easy obtaining of raw materials, simple and reasonable synthesizing route, convenient and safe operation and high utilization rate of the raw materials.

Description

【Technical field】 [0001] The invention relates to the technical field of citrus leaf miner sex pheromones, in particular to a synthesis method of citrus leaf miner sex pheromone compounds. 【Background technique】 [0002] Citrus leafminer (Phyllocnistis citrella stainton) belongs to Lepidoptera Lepidoptera, is the main pest of citrus, and is distributed in citrus producing areas all over the country. The larvae sneak into the skin of young leaves and young shoots to feed, and bore into irregular silver-white tunnels. Therefore, fruit farmers in Guangdong and Guangxi call them "ghost painting symbols". Tree growth and fruiting. The damaged leaf curls are often "refuges" and wintering places for pests such as leaf tortrixes, so it is very difficult to prevent and control them. What's more serious is that the wounds caused by leaf miners' damage to leaves and branches are most likely to be invaded by citrus canker pathogenic bacteria, causing even greater damage. At present, ...

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Problems solved by technology

What is more serious is the wound caused by leafminer damage to leaves and branches, which is most likely to be invaded by the pathogenic bacteria of citrus canker, causing even greater damage.

At present, the main method of its control still relies on chemical pesticides, such as pyrethroid pesticides, but the long-term unrestrained use of chemical pesticides not only has a partial killing effect on pests, but also kills a large number of natural enemies and destroys the ecological balance of the orchard; As a result, pesticide residues in fruits seriously exceed the standard, which seriously affects the health of consumers and hinders the export of fruits; at the same time, it induces pests to develop resistance to various conventional pesticides, causing pests to become rampant again

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