A process for the preparation of a thiazophosphine intermediate, S-sec-butyl phosphorodichloridithioate

By using 1,3-dichloro-5,5-dimethylhydantoin or trichloroisocyanuric acid as acylation reagents, the safety and environmental protection issues in the preparation process of the thiazophosphine intermediate S-sec-butylthiophosphoric acid dichloride were resolved, enabling efficient and low-cost industrial production.

CN117105974BActive Publication Date: 2026-07-24SHIJIAZHUANG SENTAY CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHIJIAZHUANG SENTAY CHEM CO LTD
Filing Date
2023-08-24
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing preparation process for the thiazophosphonic acid intermediate S-sec-butylthiophosphoric acid dichloride has problems such as poor safety, high hazardous waste treatment costs, and impact on the quality of downstream intermediates or products.

Method used

1,3-Dichloro-5,5-dimethylhydantoin or trichloroisocyanuric acid is used as the acylation reagent to replace the traditional sulfonyl chloride for acylation reaction. The generated byproducts can be recycled and reused, simplifying the post-processing steps and avoiding the generation of sulfur dioxide and hydrogen chloride.

Benefits of technology

It improves product yield and quality, reduces production energy consumption and hazardous waste treatment costs, and significantly enhances process safety and environmental protection, making it suitable for industrial production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of chemical production, and discloses a preparation process of thiazophosphine intermediate S-sec-butyl thiophosphoryl dichloride. The preparation process of S-sec-butyl thiophosphoryl dichloride provided by the present application uses 1,3-dichloro-5,5-dimethylhydantoin or trichloroisocyanuric acid as an acylating agent, which not only effectively improves the product yield of S-sec-butyl thiophosphoryl dichloride, but also significantly improves the quality of the product. The high-content S-sec-butyl thiophosphoryl dichloride product can be obtained by simply reducing pressure, dissolving and concentrating, which effectively simplifies the post-processing process, and the reaction conditions are more mild, the production energy consumption and production efficiency are significantly improved. The generation of acid gases such as sulfur dioxide and hydrogen chloride in the reaction process is avoided, and the by-products are 5,5-dimethylhydantoin or cyanuric acid, which can be recycled and reused, effectively reducing the production cost and hazardous waste treatment cost, and having high economic and environmental benefits.
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