A preparation method of trifloxystrobin

Through a one-step reaction method, high-purity oximestrol is generated in the presence of methanol and alkali by using characteristic impurities of oximestrol as raw materials, which solves the problem of high impurity content in oximestrol products in the prior art, and achieves high purity and high yield oximestrol preparation, meeting the requirements of market-oriented sales.

CN116199598BActive Publication Date: 2025-07-22JIANGXI TIANYU CHEM CO LTD
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Patent Information

Application Number
CN202111440775.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-30
Publication Date
2025-07-22
Estimated Expiration
2041-11-30

AI Technical Summary

Technical Problem

The prior art is difficult to effectively reduce the content of characteristic impurities in the oxistroester products, resulting in the product not meeting the same-sex registration requirements and affecting market-oriented sales.

Method used

Using a one-step reaction method, a crude oximester characteristic impurity or a crude oximester containing oximester characteristic impurity is used as raw materials, and a high-purity oximester is reacted in the presence of methanol and alkali to produce a high-purity oximester, and the target product is obtained by cooling and crystallization and drying.

Benefits of technology

The impurity content in the oxistro product is reduced to below 0.1%, and the purity and yield of the oxistro product are improved, meeting the registration requirements for the same-sex product.

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Abstract

The present invention provides a method for preparing trifloxystrobin. The method for preparing trifloxystrobin comprises the following steps: using trifloxystrobin characteristic impurities or crude trifloxystrobin containing trifloxystrobin characteristic impurities as raw materials, reacting in the presence of methanol and a base to obtain trifloxystrobin. The preparation method of the present invention uses trifloxystrobin characteristic impurities as starting materials and obtains the target product through a one-step reaction. The conditions of the preparation method are mild and the process is simple. Trifloxystrobin with high yield and high purity can be obtained, which can not only improve the quality of trifloxystrobin but also increase the yield of trifloxystrobin.
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