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Synthetic process of herbicide

A synthesis process and technology for herbicides, applied in the directions of herbicides, algicides, biocides, biocides, etc., can solve the problems of low yield and purity, long synthesis steps, etc., and achieve fewer synthesis steps and shorter time-consuming. Effect

Inactive Publication Date: 2013-04-03
章婉盈
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these methods have long synthesis steps and low yield and purity.

Method used

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  • Synthetic process of herbicide
  • Synthetic process of herbicide
  • Synthetic process of herbicide

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Processing step of the present invention is:

[0032] 1. Synthesis of sec-butylurea

[0033] The reaction equation is:

[0034]

[0035] 2. Synthesis of 3-(3-sec-butyl)urea 2-2-butenoic acid methyl ester

[0036] The reaction equation is:

[0037]

[0038] 3. Synthesis of 3-sec-butyl-6-methyluracil

[0039] The reaction equation is:

[0040]

[0041] 4. Synthesis of 5-bromo-3-sec-butyl-6-methyluracil

[0042] The reaction equation is:

[0043]

[0044] The structures of the intermediate product and the final product of the present invention have been confirmed by infrared spectrum and nuclear magnetic spectrum. The melting point of the final product is 158-160°C; the infrared spectrum result is (KBr, γ / cm -1 ): 2878.3, 2938.6, 1371.9 (methyl), 1463.4, 2938.6, 2809.1 (methylene), 1622.3 (C=C double bond), 1711.0 (α-β unsaturated ketone), 1651.0, 3342.3, 1512.1, 1312.5, 703.3 (amide), 587.1, 658.7 (C-Br bond).

[0045] Elemental analysis measured valu...

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Abstract

The invention relates to a synthetic process of a herbicide, belongs to the field of fine chemistry industry, and particularly relates to a synthetic process of herbicide. The invention provides a synthetic process of herbicide, and the process has the advantages of less consumed time and high productive rate and purity. The synthetic process comprises the following processing steps: the synthesis of sec-butyl urea, the synthesis of 3-(3-sec-butyl) urea2-2-methyl crotonate, and the synthesis of 3-sec-butyl-6-methyl uracil.

Description

Technical field: [0001] The invention belongs to the field of fine chemicals, and more specifically relates to a synthesis process of herbicides. Background technique: [0002] Herbicides are agents that can completely or selectively kill weeds. [0003] 1. According to the mode of action, it can be divided into: [0004] (1) Selective herbicides: Herbicides have different degrees of resistance to different types of seedlings. This agent can kill weeds but is harmless to seedlings. Such as Gai Cao Neng, Trifluralin, Prozanet, Simazine, Goer and so on. [0005] (2) Killing herbicides: herbicides are toxic to all plants, as long as they touch the green part, regardless of seedlings and weeds, they will be injured or killed. It is mainly used before sowing, before emergence after sowing, and on the main and auxiliary roads of nurseries. Such as glyphosate and so on. [0006] 2. Classification according to the movement of herbicides in plants: [0007] (1) Contact herbicid...

Claims

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Application Information

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IPC IPC(8): C07D239/553A01N43/54A01P13/00
Inventor 章婉盈
Owner 章婉盈
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