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Preparation method of substituted benzene sulfonyl chloride

A technology for benzenesulfonyl chloride and aniline, which is applied in the field of preparation of benzenesulfonyl chloride, can solve the problems of complicated preparation process of substituted sulfonyl chloride, unsatisfactory product yield and purity, and high potential safety risks, so as to reduce sewage treatment costs and avoid Safety risks and costs, and the effect of less environmental pollution

Pending Publication Date: 2021-05-07
CHANGZHOU RUIBO BIO TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of substituted benzenesulfonyl chloride, the preparation reaction process is safe, easy to operate, healthy and environmentally friendly, high yield and purity, suitable for industrial production, and used to solve the problem of substituted sulfonyl chloride preparation in the prior art The process is complex, the safety risks are large, the environmental pollution is large, the product yield and purity are not ideal, etc.

Method used

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  • Preparation method of substituted benzene sulfonyl chloride
  • Preparation method of substituted benzene sulfonyl chloride
  • Preparation method of substituted benzene sulfonyl chloride

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Embodiment Construction

[0020] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0021] see figure 1 , the invention provides a preparation method of substituted benzenesulfonyl chloride, including but not limited to the following steps,

[0022] —S1, the diazotization reaction of the aniline compound with the structure of formula I to obtain the diazonium fluoroborate with the structure of formula II;

[0023] —S2, obtaining the substituted benzenesulfonyl chloride of the structure of the formula III through the diazoniu...

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Abstract

The invention provides a preparation method of substituted benzene sulfonyl chloride, which comprises the following steps: carrying out diazotization reaction on an aniline compound with a structure as shown in a formula I to obtain fluoboric acid diazonium salt with a structure as shown in a formula II; obtaining substituted benzene sulfonyl chloride with a structure as shown in a formula III from the fluoboric acid diazonium salt with the structure as shown in the formula II; wherein R is selected from any one of ortho-chlorine, bromine, methyl, chloromethyl, bromomethyl, nitro, cyano, acetyl, meta-chlorine, bromine, methyl, chloromethyl, bromomethyl, nitro, cyano, acetyl, para-chlorine, bromine, methyl, chloromethyl, bromomethyl, nitro, cyano and acetyl. The preparation method of the substituted benzene sulfonyl chloride provided by the invention is simple in reaction process, easy to operate, ideal in effect and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of chemical industry and medicine, in particular to a preparation method of substituted benzenesulfonyl chloride. Background technique [0002] Substituted benzenesulfonyl chloride is an important class of chemical, pharmaceutical, and pesticide raw materials. Its sulfonyl chloride group has high activity and is widely used in the current organic synthesis industry. For example, sulfonylurea and sulfonamide herbicides are prepared by substituted benzenesulfonyl chloride This type of herbicide has little harm to the human body and high efficiency of weed control. Therefore, how to obtain safe and stable substituted benzenesulfonyl chloride has become a topic that researchers have been paying attention to. [0003] At present, the preparation of substituted benzenesulfonyl chloride is mainly through the reaction of substituted benzene and chlorosulfonic acid to generate substituted benzenesulfonic acid, follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/02C07C309/86C07C309/89
CPCC07C303/02
Inventor 魏峰葛二鹏
Owner CHANGZHOU RUIBO BIO TECH
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