Preparation method of diaryl disulfide

A diaryl disulfide and sulfur powder technology, which is applied in the preparation of hydrogenated polysulfide/polysulfide, magnesium organic compounds, organic chemistry, etc., can solve the problems of high cost, large pollution, and low yield
CN110776446AActive Publication Date: 2020-02-11HUNAN NORCHEM PHARMACEUTICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUNAN NORCHEM PHARMACEUTICAL CO LTD
Publication Date
2020-02-11

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Abstract

The invention relates to a preparation method of diaryl disulfide. The method comprises the following steps: reacting halogenated aromatic hydrocarbon with magnesium powder to generate a Grignard reagent, adding sulfur powder, and carrying out a reaction under the action of an acid and an oxidant to obtain the diaryl disulfide. The aromatic disulfide is synthesized by using the cheap and easily available halogenated aromatic hydrocarbon as a synthesis raw material, and then reacts with the magnesium powder to generate the Grignard reagent, and the Grignard reagent reacts with the sulfur powderunder the action of the acid and the oxidant to obtain the diaryl disulfide. The whole method has the advantages of realization of direct synthesis without heavy metal catalysis or complex ligands inthe process and midway discharging, environmental friendliness, high conversion rate, high yield, high purity, simple process, convenience in operation, and suitableness for large-scale production.
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Description

technical field

[0001] The invention relates to the technical field of organic synthesis, in particular to a preparation method of diaryl disulfide. Background technique

[0002] Aryl disulfide is an important class of organic reagents and synthetic intermediates, widely used in organic synthesis, polymer and other fields. It can be used as a vulcanizing agent for the production of synthetic rubber, natural rubber and other elastomers. At the same time, aryl disulfide is also an important drug synthesis intermediate, and can also be used in the synthesis of feed additives, flavors, pesticides, etc.

[0003] There are many reports on the synthesis methods of symmetrical aryl disulfides. The most commonly used method is to start from thiophenol and obtain it by oxidation of hydrogen peroxide under the action of a catalyst, as shown in the following formula. However, the thiophenol used in this method has a foul smell and is very polluting to the environment, so it cannot be a...

Claims

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