Spiromesifen derivatives, processes for their preparation and use thereof

By synthesizing new spirodiclofen derivatives and applying them to the control of crop mites, the problem of insufficient spirodiclofen activity has been solved, achieving highly efficient control of mites and crop safety, especially with significant effects on citrus, watermelon and rose.

CN116715644BActive Publication Date: 2026-07-07HENAN LANCHUANG CROP SCIENCE CO LTD
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Patent Information

Application Number
CN202310581221.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-23
Publication Date
2026-07-07
Estimated Expiration
2043-05-23

AI Technical Summary

Technical Problem

Existing spirodiclofen has insufficient activity in controlling whiteflies and mites, especially in controlling resistant whiteflies, and there is a need to develop more active derivatives.

Method used

A novel spirodiclofen derivative was synthesized, the structure of which is shown in Formula 1001. The derivative was obtained by reacting it with N,N-diisopropylethylamine and fluoroethyl chloroformate under inert gas protection, followed by purification. The derivative was then applied to the control of crop mites.

Benefits of technology

This derivative has high safety for crops such as citrus, watermelon, and rose, and has superior mite control activity compared to spirodiclofen. Its fast-acting and long-lasting effects are better than the control agent, and it can effectively control spider mites and two-spotted spider mites.

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Abstract

The application discloses a spiromesifen derivative, belongs to the field of crop disease and pest control, and has the structure shown in the following formula 1001, a preparation method thereof is as follows: under the protection of inert gas, 3-(2, 4, 6-trimethylphenyl)-2-oxo-1-oxaspiro[4, 5]-non-3-ene-4-ol and dichloromethane are stirred and cooled to 0-5 DEG C, then triethylamine is added, fluorine ethyl chloroformate is added dropwise, after dropwise addition is completed, the reaction is continued after being raised to room temperature, and then purification is conducted, and the spiromesifen derivative is obtained; the spiromesifen derivative has higher safety for citrus, watermelon and Chinese rose and has better pest control activity than that of spiromesifen.
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