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Preparation method for high-purity pyraclostrobin

A pyraclostrobin and high-purity technology, applied in the field of preparation of high-purity pyraclostrobin, can solve problems such as low purity of pyraclostrobin, and achieve a high-purity and easy-to-operate technology that is beneficial to industrial production. Effect

Inactive Publication Date: 2019-03-08
新沂市永诚化工有限公司
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  • Abstract
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method for preparing high-purity pyraclostrobin, and solve the problem of low purity of pyraclostrobin in the prior art

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  • Preparation method for high-purity pyraclostrobin
  • Preparation method for high-purity pyraclostrobin
  • Preparation method for high-purity pyraclostrobin

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Embodiment Construction

[0043] The technical solution of the present invention will be further described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following description.

[0044] A preparation method of high-purity pyraclostrobin comprises the steps of:

[0045] S1 Preparation of 2-[(N-p-chlorophenyl)-3-pyrazolyloxymethyl]nitrobenzene: Add 1-(4-chlorophenyl)-3-pyrazolol, acetone and potassium carbonate to the reaction In the bottle, after heating up to reflux, add the acetone solution of o-nitrobenzyl bromide dropwise, after the dropwise addition, reflux for at least 3 hours, concentrate to remove acetone, then add methanol to reflux for at least 20 minutes, cool to room temperature, stand for at least 30 minutes, filter, Obtain 2-[(N-p-chlorophenyl)-3-pyrazolyloxymethyl]nitrobenzene for use;

[0046] S2 prepares N-hydroxyl-N-2-[N-(p-chlorophenyl)pyrazole-3-oxymethyl]aniline: add the above-mentioned 2-[(N-4-chloroph...

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Abstract

The invention relates to the technical field of compound synthesis, in particular to a preparation method for high-purity pyraclostrobin. The pyraclostrobin is synthesized from p-chloroaniline and o-nitrosotoluene as initial raw materials through the steps of diazotizing, cyclizing, oxidizing, bromizing, condensating, reducing, acylating, methylating and the like. According to the preparation method, the problem that the purity of the pyraclostrobin in the prior art is low is solved; and the preparation method for the pyraclostrobin has the advantages of high yield, high purity and high material utilization rate.

Description

technical field [0001] The invention relates to the technical field of compound synthesis, in particular to a method for preparing high-purity pyraclostrobin. Background technique [0002] Pyraclostrobin is a new broad-spectrum fungicide. Mitochondrial respiration inhibitor, with protective, therapeutic and leaf osmotic conduction effects. Generally, the medicine is sprayed 3 times, and the medicine is sprayed once every 10 days. The frequency of spraying depends on the condition. It is safe for cucumbers and bananas, and no phytotoxicity has been seen. Pyraclostrobin is also known as pyraclostrobin, and its chemical name is: N-methoxy-N-2-[(N-p-chlorophenyl)-3-pyrazolyloxymethyl]phenylcarbamate ester. The chemical structural formula of pyraclostrobin is as follows: [0003] [0004] The mechanism of action of pyraclostrobin is: pyraclostrobin can act on the oxidation site Qo of b and c1 of cytochrome, block the synthesis of ATP, inhibit the respiration of pathogeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D231/22
CPCC07D231/22
Inventor 徐西之陈华都
Owner 新沂市永诚化工有限公司
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